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1otbs prom the fashionable l?tb?ats, tim ?rud Fancy Drcn Ban at SaraUfa, Ore.. *c.. Ac. . United State* Hotk(-, ) August 20, lsr>0 S Tk. Grin* Fancy Dm, BalT< *+ | tumcs, $ c. *_? -< I This has been a singular day in Saratoga. There Las sprung up within the last forty-eight hours, a disposition to throw cold water on the approacliing festivity. I mean, of course, the fancy dress hall which is to take place to-morrow evening. But, notwithstanding all, I thii.k we shall have u grand affair. The truth is, that the names on the man* gehal list are sufficient guarantees that the ball will possess the main requisite?respectability. Many costumes have already been selected, and there cannot he a doubt that the ball will turn out a good one. The Messrs Marvin Jsave done all in their power to make things agreeable. They have improved their arrangements for lighting up the grounds uround th<- hotel, and the arrangements for supper are all that could be desired. Within the lust half day, a great many small bills of the following description have been circulated. You will perceive that they announce an entertainment, which is to come of!'at the same time as the grand ball. But here is a copy of the hill:? Pancy Ball Concert. at Saracoo's Room, at Mr Walton's building opposite the American dotal. Saratoga, on Wednesday evening. August 21st, I860, at lOo'elock. Mr. Saraceo. being on the eve of tearing Saratoga for Nsw York, neiiee this opportunity of thanking his pnpils and the public in general for their constant sapport, and hopes they *>11 honor this his farewell Bail-Concert by their presence Mr Saracco begnto say. that on thin occasion he will ham the pleasure of offering to the public the choicest music, performed by artists of the tret reputation, well known Id America and In entire Europe Programme -1 Overture of the Onera La Dame Blanche, by Boieiilii-u 'i. Tip Top Polka, by Marrtxek ? Loreiey Krln KUnge Walta. by 8lrau*? 4 Saratoga gehottWch. comport-J expressly by Mr Bandinl 6 flolo on the ll?ra. by the e*-lrbrat<-J Mr Kieti-r 0 Kaiilien folks by Kulin<-r. 7. Bedford Walt* by Strands H Ferdinand <}uadi illo, by Btraurs 1) Kline 8chottlach. by Volkart. 10. tirand Concert on the k'lute. by the celebrated Mr. Aoeasto 11. Uerman Cotillon Ladles and gentlemen may attend in fancy ball costume, or not, ait they plea** Tickets one dollar each. r Now, Sararco, who id generally populttr, hits many special friends in Saratoga. Moot of the good dancer* here are his pupils, and it it) mor? than hiuted that there will be a grand time at his hallconcert, as he designates it. He has an excellent little orchestre of nine instruments, decidedly the best in town. Well, we shall see what a day may bring forth. THI FANCY DRESS HAU.. AUUUST 21, 1S50. The grand day has arrived. The ball takes place to-night, and Saratoga is like the vicinity of a warming hive of bees The costumera' rooms are crowded ; the hair dressers have more orders thin they can possibly attend to. The grounds at the United States Hotel are magnificently adorned, as asual, and all things betoken a good time. The weather is delightful, warm and pleasant. I send you the following memoranda of costumes. There may be some alterations, those I shall correct hereafter. I have already sent a list of the MiansgcTH, they are all t* wear blue badges; the directors to wear scarlet badges. COSTUMES ENOAQKD. Miss M. Rablnson. Baltimore. Marian. In the Wife; white silk dress, crape overrklrt, trimmed with ftovsrs taaty, open worked bat. Handsome Mr. Lanee. of Maryland as Blaa Bilk Polka. Mr. Allen, New York, De Haprau; black and orange. Kieb. Mr. Ogden. of New York, blaek and aearlet, richly trimmed with silver. ? Mr. Howard, of Baltimore, Brigand; royal purple velvet, trimmed witb blue and stiver. Mr. Weod of New York, magnifleent Spanish nobleman'i dreaa, aearlet and green. F. K Howard, of Baltimore, aa Don C?**r de Baaan; green silk velvet. Mr. K Livingston, of New York, Bob Roy; plaid, tartan kilt, he ke Matters Hrahum. of New York. *ne Turkish costntae. n? Spanish page; Miaa Graham aa Amaoa. Children mt David Graham F.C Wadds 11. of New York. 1st aa a Man-of-wars Man, nnd afterward aa Paul Pry. Mr Burkhardt, of New York, as a rirate; a moat Biagnideent coetume. Mr Morrlaon, of New York, as a Manof-wars Man. Mr Cutting, as a Maa-el wara Man. Mr. Lloyd of Maryland do Mr. 0 Kane, of New York, do. Mr. Kent, do Mr. Alston, do. Mr. Bhilton. do. Mr fowler, Uleecker street. New York, * Mr U W. Jamee. of New Voik. do. Mr J B. James, of New York. do. Mr. A B Rldgley oi New York, do. Mr A Lloyd, of Baltimore, do. m. u ...... /.r n..? Vork am *n ilnln* Rri/utd Mr barelay. of Nov York, m IUol?t. Mitlit Dunean, a? a Hpanlnh Bull Klghtar. Mr. l>uac*a. a? Ma?t?r >V?U?r Id th? Huoohbark Mis* Jackaon. from Virginia Bohaailan I'mmiI. Mi** K Allfii. of New V ork, DpanUh PmiuI. Hin J Allen. do Turkish I'vaaut kill H'Mtnry. of N?w York. a lUIJiw; a mtgaifl *ct imrlrt jacket and white *llk ?ktrt, mbroidormi with (old Mr Low. Mmrlet Attorney of Baltimore. court tall. KaglUh modern lit)I* Ml** faniainr. of T<ria(, u Bnchantraaa; Mack gania trimmed with hleinglypbloa MIm Walroua. of Alabama, a* Night; blask lao*, bla?d with illttr. ?ur mounted by a cornet Ml? Harmon. Greek; gmn toil pink. VIn Harmon a* a Bol? miau. Mn Joaaph ax ?atde*;gi>kd Umu? aaaif and lorb?n. Mr. J l'belp?, a* a Greek J amen II AaUnon. aa a Turk. Mr* Haralay. of Naw York aa llclan of J?ru<al?a. Mr Chotaoa-i of Fan*, a Krenrh Handy Mr Kdward Jona? Nrap-tlltaa Nobleman i Mr Key, magniAcent Urwk eo?tumw. Mr. iaiitriwi a?'a?l-?id, red ??iT?t u .. , ..k .. . . V ,i _ Mr FarUb. u a North Amarlran Indian. 8. Allan Smith Albany North Atnartoan I adiaa Mr Harmon. Italian N< b Inn in Mr. Wo>4 Cpani'h No >laman kin A?hl?y ilaoghtar ol Mr? Oaa Aahlay. af Bl. 1-oola, llarolio of M?a boddlea and doubl* aklrt, whlta aattn ti lmm< d with ?hlta ptarla, polgnard In har bait: J??aria la hrr hair Two youag ladi'-" daughtara of J. V Purdy, of Naw Tork; oar aa a Cnucb Marehloaaaa of tha lima af Loal# XIV; tk< otbrr aa a8wi*a Heaaaat. both draaaaa vrtj rleh. Mra il C. Tabal), of Richmond. Ya, as Lo-la di l aaarranor rub roatuma. taada by Mrs. IJortaaaa. at Mra Utlb?rta Nlaa Cjl??a Lirlojitoo, of Naw Tork. M I Pnaal lit Two Mlaat* Lawranca of Naw York. P?*?aat Olrla Mlaa Powlar of Saw Turk. I'raaaat tllrl. Taro Mla??? K?ra< i han of Naw Tcrk.aa Marriai-aa Mra AI|?tK>B*?. of N?? Tork. aa a Marqulaa, b?au Ifnl blaa brorada. trimmed with rich laoa hair powdarad; 4>aaiond< aiid B< aara Mr. Phillip*. (aaatomarO of Naw Tork, aa Jack Falatal Mr J ah a Jobmoa. of Naw York a" I'latol. In llanry IV Mr Joha R. Mil lot t, of Naw Tork aa Bardolph la llaary IV. I nitco f?rar** j f*f.*Too* SrKiias. August 19, IHOO \ hrtal Saralmgm?to Pint*t (i imtJia* A'o tin trim t B*Ut??A]Fmir? i* (iemtrml. We had f.rr her* en Natur<l*y i mhi, wnich ? d a fn iiirt ?ho,i and apholmery nuMnNon one of the hack atieeta. Fortunately, the kctiding ?u UulilcJ, and the firr did ant eitanl I yood lh<* hoi:?- in which it on ;in ited. Soma o' *ur New York firemen were on the ap<>t, aad wer* moit active in the <n icavor, th< ?jh a eatu ,>a? i t o?rd to l>~, to at*e prop rtv. The l?n? waa about |'l T?K> Their w?o about |I,2M) inaurince. The report which l RKtttoned in my laat, ahont Ihe if < r.hrrn- d. nlilimch it i* paid the eery heaey fitting only atm>noi>a<i to a hurlea^uc. ft ihia an it ma), the authorities and other persona m inflnen< < h?re havr d< t. rmined M procure th? pteenge of r?-w Uwa, or the enforcement "f tli-ae already in niiience, ?n aa to break up thi? tee heave aport in filiate. They widely conclude tin it Wit I II-1 r>' lli> ! 1(1' it .ill well l, runt I" The Mwmu hare already beiruri t<i de??fa? their grounds fi>r W'edwwlny nigtit. Tl?ey ati makirff preparation* on a Inr^e urate, and th? l?:| |-r? II.--. ? 1)1 |e * her r ;'nitlC- a? all " I'tMee, th<- prince ?./ hair-dreearr* r<tni? iipyeatrrnnd haa already rrcneed HUUier<Mi? ordera. 7 here are to I*- two dinner partie* at the lake, mda?. If ili-y produce nuythm?( worth* i f ante, 1 nhxll it-form you. Vou are, J n^toae, aware thit a day at ^e.ratOf:a ia not conei lereit complete *iitiimt a rnH |. lb)' : lie i" th 1 hi I' | i i 'ii - I iii- . th# pecrliart'te-a of the aeaeoti hi re ihla ?>tni?n'ia en af>*cnce i f tlie bell*afalem at th- hotela. Ilereli-fiire, ra?'h hnure |i.i? hid ita reiifnii!* helle, ta w I , .1, |.i| ?li it. in v w, re , il l :? i lt n : . at ball", h.hI el.enl?-rr, whenever U?e o>'ca?i< ii ?i'i-> it B^ifo^rim*. Th* weather w*a eireertHitly cr ld v?t> nlav and la?t eveni.ijr, li lt ii t? r?i< re fon fi t: .hie now, mi) nrercimti a>td woo'l-n eh wla ha?e gfVru place to mote ?uui neMikt *?<pnrel. A Hfft ri-r.-n >'lon *m? c?mcH ihia ninrmiif, he the ana snivel t-t the ll'miti Ttvre wua a prrfect j?rti a' Mnadell A* K,*io-iei'e, your agent*; aad, w'ien ithiibi i'1-eed th a il.eie w?r? no Urtl-lt, e. i h . . t ''i wi-'i i. -i , '<in ,| foanteaoii e. Arnoi i! 'h' di?tir>pni#> *ii r? ai lenta at the Knifed htatea lii ul nre lion Ju.lif- Wo??.tSiiry iad two *a?rht?r?,*4 New Hamw^ir* ; lion !w*?id 1 intiam I fanul), of New Yi'tk; tlufl. I* r?iik (Granger, r / ? New York: Major Kearney, U. a. A,? fimwael Hoffman, Miaa nowell, John Marrdrth and family, of Baltimore; 1%. Norm an?l/family, Mr. Wanwll and family, Mr. Fisher uH family, M.m S niih, Miss Wharton, and Mr/Thomas and lady, of Philadelphia; Col. Tu^Py, o! Virginia: Hou. W. W. Bozrdman, of Cqpfiecticut; Lieut. May, (J S. A ; A. Trudean anftwo sisters, and Mr Lamhath and three ladies,iff New Orlrana; Mr. La>nar, of Brooklyn; NarulfWetmore and family, Mr Bergen, | Mr. Livingston# Mrs W. C. II Waddell, Mrs .ludue Kent, Mff and Mia Belden, Shepard Knapp, 4?Kaq , and l)r. Bedford and tamily, of New York; Miss Pickering, Misa Wilkin;), Col. Choturd iind family. Dr. l>uncan and family, of IfljM j laklL Thompson and ladv, of N. J ; lion. F. S. Lyon and two daughters, of Alabama; and a distinguished party of Cubana. Unitkh Status Hotel, . I Saratoga Sikinos, Auguat 17, 1850 y Amutementt? Mr. Dtmjnttr'i Concert?Panorama of Amitndam? Vundertyn't Portrait of Utn. Taylor?'Hie Bait on Friday evening? Pic-nie? On me of Brag, frc. There is, as yet, no falling off in numbers here. The hotels are still full, and like to continue so for a week to come. Among the modes pursued by the (lite to kill time, are attendance at concerts, visits to the panoruma, ball*, pic-nics, Ate. Mr. l)finnAf#*r th#? vtwuliht. irnvr.it. ?onc!frt at Congress Hail, latt evening, winch was attended by a large and respectable audience. In fact, the room was tilled, and a number of extra seats were introduced, after the singing commenced, to accommodate those who came late. Mr. D. was in good voice, and gave a moot acceptable entertain0M nt. 1 went, yesterday, with a party to visit the panorama of the city of Amsterdam, painted by Hurford, and exhibited by him in Loudon with great success. The painting is now in the possession of Mr. Vanderlyn, who is exhibiting it. The paiutin ranks high as a work of art, und thecontemplatio i of the picture aflords most agreeable pastime for an hour or two. Mr Vanderlyn has just completed a half leDgth portruit of Gen. Taylor, and U now about commencing ihe full length painting uf |rtte Present, which the Common Council of New York have employ fd him lopiint for the Governor's room in the City Hall. Mr. Taggart, a young artist of great promise, is at work on several picture in the same room with Mr. V. We had a magnificent ball at the United States, on Friday evening. It was attended by the best company in town The ladies were not dressed 111 grtudy style, though many rich dresses were is the loom. The dunciug continued till past one o'clock, and till went oli? well. While this ball was progressing at the States, there was a very pretty hop going on at Union Hall. 1 here was u pic nic at the L.ake yesterday, given by a club of eentleinen. The table wan set under ihe trrrti, alia about forty-five persona dined at it. Amonu iii?- ladies present were Mrs. Dr Rush, of Philadelphia, and Mrs. Jacob Little, of New York. In the Cfturse of the afternoon a slight misunderIlliiH ttrooe between two gentlemen. Politics and champagne caused the disagreement, which, however, was soon healed, and the pic-nic wound up with a dance in the hotel. Since I huve been here, I have roceived a conan unicaiion setting forth that, a few days ago, a K> me of brag was played on which there was $500,000 at stake. The loser, it is said, compromised by paying $4,000. I give you the rumor. What the facts connected with the transaction were, I do not at present give, except that the betting is said to have commenced at $1,000, then gone up to viut $5,000, plut $5,000==$ 11,000. and so on till the $500,000 was reached. The most active prejmrauons are making tor the fancy ball. Ocean Hot-**, Newport, August 20,1850. The Fathionablti?Mr. Clay in Church?Mr. Clay it Bathing?Tht Pint Artt. I arrived last Saturday at this celebrated resort, where beauty and fashion annually congregate, and fonnd, to my disappointment, all the public houses literally jammed. Although we telegraphed the " Ocean" from the Astor House, on our arrival we were sent adrift upon the uncertain voyage of steeri ng for some other haven of repoa*, which ws found, after being rejected at several points of the compass, at the Park Houae, and there domiciled for two nights and a day, then transferred ourselves and baggage to this, our destination, which now feeds and lodges abant 900 visiters. l lua is uDoui me neignt oi me season ; eonvqnently great preparations are making for fua and frolic by the dulcineas and daidiea, tke beaux and belles, the old and young? all, yea, all ia expectation, exc itement, emulation and envy. Lut Sunday there was a partial cessation of hostilities, and the example of this church-going community was followed by the visiters, who, whether distin? guirhed by the world's favor or not, turned out tn munt. Mr Clay attended Dr. Charles, while Trinity waa filled wi h a charming company. This is ihe nldeat church in the city, having been erected about 17% It is very antiquated, and has an aristocratic appearance, whether you look at it when it ia empty, or tilled. The organ was pre* tented in 1733, mid is still surmounted with the crown of King lieorge 111. Some of the tombstones are to defaced by tune, as scarcely to be legible. llrrr and there you can jest decipher in old Kngliah, " Departed ye life," iVe., with some difficulty. The aftetnoon waa devoted to rides in thr country, the aea shore, sea house, See., which ailorried a beautiful and |*cturesqe "ride as is a ride." The whole island seems completely divested of timber?ihe few trees that are standing ate of a stunted growth ; coal is amversally usedeven all the fences are mtda of stone. 1 observe amongst the distinguished visitors at tbe < *cean House, Major Hcusley, and thr lion Mr Gwia, U. 8> Senator, both from California. 1 he latter gentleman had his charming and tmigni11cei)t lady with him. Monday was cold?old Iloress came freighted with chilly salt apr?.y, and very little was done lu (he way of umustnient or bathing. To-day there is a mure gmial atmosphere, although the rolling i if I hf rnrriHwa. liMfkn. tV r . kirk nn h t?fn#-nitoii?i dust. In the morning I went wi(h never*! iadiea and (jentlemeij '? beach, and *aw number* of l>oih irm, with Mr. Clay at (he head of them, take a hath; il was the moat ainuamg and groteaipie acene I ever saw. I nave Mr. Clajr a hearty shake of the hiind afterward*. when he remarked that fcrn baihiiig waa a great luxury Alter dinner I accompanied "<eriHt? r (' win. Major llensley, I>oetor ycheaebly, Mr? (>win. and aeveral other ladies, to the Mudioof Mtxa Stewart, the dtughtcr uf the clehrnted artist of that name, whuae demies have a fame that Americans may he proud of The object of our viait waa to aee a full length likeueat nt Washington, which ahe copied fro a the celebrated original painting of her father, and * hich for yeara haa decorated the Sute Houae. I |er picture la considered a perfect dagoerreoiyp*. and thia beautiful " work of her fair h*n<1-," ? Inch she labored at f?-r m Month.*, waa not only rn| fnri u?ly adiured, but bought by Major Henaley for (700, Nnd which he intenda to prrsent to California. Hut my paper u> out, and I muat nay goo I *>y* Tk? Vrmpm. The Plamtrr'i ( i/n? ) W</r<> att, of the let inst., am* the croiM in thit viiuntv are autlermir for w?ni ?.f rmtn. Tb# Ktfrbitoebea Ckrimirlt, of the :M aayai? The planters hntr hrrn in *rcal alarm, during tbe I a* I frw data, bfftiH rr|x>ria ha?e brea prevaleat dial thrir old tnrmy, the army worn, had ajmn ^_"?rrd iq the cotton lielda ol lUpidra In fact. It wa? tM ikat K>lua *b?'' M Uaa d<-atrnyed wiihm a few mile* of thai !?? ; but, on inecr ligation, it H dfatowred th it it ia naif the giaa* worm that h*a croud aw nmch alarm; they lute dear no laiury, llief artrr do much, and where thr plough and ho? have not been ^'iiU* ei ci ^h on ij, they arc a btr?'injf, aa they deatroy thr |ihm> ihat would oth?rwi?c injure tb* cr?n?. ft m aery |?<??ihlr, |?rb.i|'? r*n prntiaMe, lUnt tha rc?l ?ini?'n purr a ?jr a,ycar in Hie ro?rw of the full, hut be hue am crrwinlr yet triads hia appraraaci in the?tage; wh? ;i be rnpiaa, it will br iiaie ?ii? i>i;h ?> to iMr hta We rnah>- thr f< 'l->win? eltracl from letter u tl>c (ialvr?tt>ii A. lei. ?i?t?rl I.ariMa, Cbcrakee ri iiily, T*saa, Jaly 21?In mv journey through thr loiMiiii X ? ( M nt^i lurry, ?'tihrr, llutiemn, Awtleram, ai d ( herokec, I ain j?l?*aeii in inform )on thai I haae found thr etojia j!"U<*r?lljr in ij'iilc a f. nn-i.'hf r. ii i 11. ii. ?f- itir t-'irriil forct."| du* it tinned iu '>jr thr |i|?ulrr* in llir early ?>irt ' ft Ikr WuiD. la raaar'|(rlM <>l tl?- I ilr ?n i iinl?ti>llblr ?|.r rt |"MM, llic ? |o|. i* barkward, but ' th# wmiloi. I?n tht fiat an wrra? or i wo month*. I l.a* teen ?u -i enny fwtfah'r, aiid Ihrf ifnicfa k**r rnerfe a Imp'ovemeat i f i?, and r >w h.i?r the prvt|?rtif *?.nlixo y m ahuudani rr w*r.| for iheir I* ciiMlliri i? rl ii <1>i?iiy. Corn and eotM'U hoi h ook well. Ti c fir Ma iir>?"Dt rally very el?arol ai d K*i f?. liaiur roaliour in abuutllir ri?(lii iit?e?,# nd at pt?'prf iMrrvala. A Itlier lit in -"N Autn?tine (Triaa). #?y* the ?ui a? mi hue apf*aeril in that rrjioi, and i* ni * k'i i' #ieat r?T?nr?, Uyina m holr h? l>1a aarc. 'I l.c A'eji-i <lii . (I<? ) RtfttUt iin aiy* ihat the I ?<iiii a ntiIi# r ia krt?(in( nut tha crO|ia liorly. A yoatf r.ra ?n | him*?tr a? tbr Nae bf *> la? ii.it* a ?,<xl U-la?? la V?> ' tkiat anil MuuMtnlb by anil-ailar ai'#v [ tlii < Ii i.? l? I,ii?ii n i iici m'i ll? atartci r?a , < ?a*Ua Ma' batitg ili.Ua a h r?* %n-l wg a aklali k' m i? ia imu. , SCIENCE IN AMERICA. COXTECTIOH OF THE AMERICAN ASSOCIATION FOR THK ADVANCEMENT OF SCIEICE. INTERESTING PROCEEDINGS. The Yelcanoes of Central America, &o., &c., &c\ Oar R?w Haven Corrtipoiidcnta. Ntw Havkn, AukuhI 21, 1860. Thought* on the Btmjitt Ht nutting from the drtt and Se tenia?Third Lay of the Meeting of the Am mean Auoetutu.n for the Advanetrntnt of Heunee. The learned body now assembled at the American At-borintmii in New Ilaveu, are doing much for the advancement of sueuce; and, il I may judge from the communications which they are daily making at the College, will continue to davelope many yet hidden divimtiet) and geniuses of the human mind. l'erhapa thera is no species of history that s? evidently allows a superior destiny ruling over humun affairs us that of the invention and improvement of arta and sciences, and of which man is pardouahly apt to be most vain. It haa been truly said, " the production of an art was aa instant of pleaaure?a union between idea and character, between body and spirit." Thojgh we race with reverence the inventions of ihe huuidu mind to the Bimple principle of its observing and describing understanding, I deem it a difficult i oint to determine wh.it the arts and sciences have contributed towards the happiness of minkind,or how far they have increased it. I do not think the uestion ia to be answered by a single affirm itive or negative, since in this, aa in every tiling else, all de|>eiida on the use made of what has been invented. That there are liner and more artificial implements in the world, so that more is done with less exertion, and consequently much human labor is spared where it can be disused wi;h, admits ot no question. It is equully incontestible that every art and acience knits a new bond of society, of that mutual want without which men of art caunot live. But, on the other hand, whether this increase of want extends the narrow circle of human happtneta; whether art be capable of actually adding anything to nature, or whether nature ia uot rather debilitated and depressed by it; whether the tab-nts of att and science have not excited propensities in the human hreaat which render the attainment of man'a highest blesaing?contentment ?much mure rare and ditnrult, are question* that luminous hittory, the daughter of time, alone can solve. Men of genius* are obliged to leave to disposing fate the effects and uses of their discoveries. The inventor of gunpowder little thought what destruction, both of the political and physical powers of man, would ensue from the explosion of his " black dust;" still lessconld he see how the beneficitnt seeds of a Lew and different constitution now germinate in this land, made free by the use of the same material. THIRD DAT. The Scientific Association met in general assembly this morning at the usual hour?Professor Bache in the chair. The minutes of the preceding meeting were read, and also the minutes of the Handing committee, who suggested a further subdivision of the sections, in consequence of the number of papers which are to be read. They also recommended that the afternoon meetings be confined to the reading of papers, discussion being omitted. Adopted. The Prbsidmt announced that the stand tag committee had nominated Professor Louis Akssmz, of Harvard, as Preaident of the association for the next year. Tha nomination having been unanimously confirmed, and received hy the meeting with applause, Professor Agaaaiz briefly returned thanka for the distinguished honor conferred upon him. The election of several gentlemen as members of the association was confirmed. An invitation from Mr. Miller, of New Haven, waa received, requesting the pleaaure of the company of the member* of the aaaociatiwn on Friday evening. Accepted. Mr. Brewater invited the members of the association to view his hall of paintings in this city. Profeaaor Siixmam, ben'r, paid a high compliment to Mr. Biewiter as an artist, and a inan of geniua and enterprise. He also described some of the historical paintings that am to be seen in Mr. Brewater'a lull. Tup invitation waa accepted, and the member* agreed to visit the hall between eight and nine to-morraw morning. It waj proposed and carried that tha afternoon ession should commence at 24 o'clock, instead of '8 o'clock. The TuAtuu announced that he received a boo $660 last year, beaidrs $50 front the Smithsonian Society; and that, deducting all exiienses, there u balance of $61 in hands, exclusive of about $60 received at the preaent assembly. Ha would mention, in order to atimulate the member*, that out of 600 members not more than **) had paid their subscriptions. At the request of the '1 rearn re r, and en the nomination of the Preaident, Fro feasors Silliman, Jr. and lloeford, wrre appointed auditor* of his accounts. The meeting then adjourned into three aecttona. In the section of phytic* and mathematics, Profernor Henry pretided, and Professor* W. B. Rogers and Loomi* acted aa Secretaries The tiitt comniunicatton was on a new method of observing and recording astronomical Right Ascension* and North Polar distance*, bjr Professor O. M Mitchell, of Cincinnati, and well known amongit the scientific men of New York. Piol Mm iiki i remarked, that at the last MM*] meeting ot the association, ne had given *<>me outline of plans which he had contrived for observing and recording astronomical observations, by the u?e of the electro-maguet and other auxiliary ap I'uiaivn. lie uuw pivprnru iu uuunur iiiuiwii ai* niool entirely to the emmioation of the re*ulU recently obumtd by th<* new machinery, in the determination of North Polar dwUnce. He Mated that the method of recording the clock beat* and minute* of trantuta of atari in the tranait instrument, by the el* ctro-maguet. had beea in line now mote tlian a vtar. 1 hi ring the whole of thia period the delicate Ibre of a uptiler'* web, which waa *o arrxtKed a* to untie the metallic lever to the pendulum of the clock, by means of which the clock la made to record ita beat*. had never been changed, and throughout this lime not a solitary rrcoud of lhe clock ti?d ever keen loat through a failure in the formation of the circuit by which the electric current^* tratmraittcd. He then e*|>Umed the three prime adjustments < ( ihe rt-volving diFC, on which the time aal <>!>tervatioti* are recorded. In the c our Br of hia re niklka, he hid l>een led to notice the fart thai ili>MtH interval d time fv tween the forming of a metallic circuit, by which an electric current la tiaiitmitied Uiron^h an electro-m<gn?t, aad the leetotae of the mugBet, u not i nly aivreciable, bat variable, and deiienda on a variety of conditions. Tin* ink rval he denominated armature time. To five inrreayed aeeumcy to hi* observations of ruhl kxeiiHnn, he bad found il necemary to measure th * trm-uure time, And to determine it* variation* Thi* bud hern readily a<r-om|>ltahed by mean* described, him I it hud Uen found that the armature time i f hi* reeordiof pen* varied, from an alraoM inaj<t>reciahte qu uiiny, up to three, orerenfAtir, hnnrimlih* of a second of time during ihe *\me Dili lit After ? few other explanation*, the Profewof procetdid to give un acconui of hi* n< w declinv mn iriir litnrrv lie hnil abandoned th? u?e of a divxNd circle Mitrtilh, or horizontal, point* 10 the <!<-?? rniinuiion of nor h pnlar diitmc*. By th* n*w in? thod be u.f??nri d dir?c?ly the fluiTiCi*r* ??f ihciicl'H d?wfibrH by the Hrrntn.mUr atura around Il.r ?h> n fhi* diameter did nnteicef <1 2fi <l? (f ir:.()it?? < ! arc. Thne Har* U-iof well d?l?-rnuii'rt, they >wc?m'- aundardii for th?" rtfrrtnijc af it<?e otijtet* RNtr re mute from the pole. A (i>lli^*rin.l? ??? icIUIlM between the Atl'rltr? ote? r*. tint" of K. I*. 1? and thoae made at th* K*>?l Odrrrtilotf, fiteinwirb, liogland, in I'M"), III tfi* full. wing fwriMllUrni? 1 Ihr irhmt << uim< y of the oiwareations i?n n iti irb wire. 2 TM nnmbcr of nh*?rvaiionn which c?n he luki Dili givrn mr.r by rb' new nr. I old in- lbo>l?. it wan fi u?d h> an ejreMed <:vni|>ari*on of oh*' iVUMlop l?'?ny otijr. le, an i. I'd Hit! dmnrter of Ih* tun, ?!?* \ I' I). ?.f ?he north e'er, and til* Internal* Hi d?'fIiukim n of ninny niiti'iird mar*, llial In ?V'ty rntnpariMMi ihe wm ineaajre* hid the ad*ar>t *0* in hi riimrjr i?rrf thr old. Whi dkiifcfi rtklrd, It ? as alio shows th-it ulillr (Ifnmith r* niil'diii'i|jir u!>te'v*ihin,tl?* few nciiiin ?wM rMblt ikr oiMrrTtt t* ifi *ri it it tinte* thet feuit.l<rr. it hull fi^'U lour d by an nmnini on of the ri-'-i?ifl?d i bienraii> i>*, d?ir * llWtiiOf?ii*ii!i, that by the new tie thod, ih* ot??rr?ir at i.'uwint.uil had ii llilr to aci Ifapiiftll a cn-aler n ini> r nl eilvrt Vaiirn* in a iir?>l<' nwwih th?i? h-H !> ? n>iilr in |?t at th? Kuril lilw*t?morjf. The n 'frarirl Mtino w?* aecoitnted far l?|r m.?r? irrt el nwiri af< nted i? il # w irwih' d? of r<ad",f fhe roialliif i.f iha tfle??>|>e, wtula t!>? greater iin trmf i hnirt i?n? ar>*a from iha imratinftion *1 tin r"irti|i|? t.f if|?ii'mn Tbi iVf-nr tMfc< 4 Ijf <Jr ;'-ig l<i 'k* f*e'# I that the kw machinery was exceedingly imperfect, having hern, (e a great extent, made in the < >b*rYatory by himself and hia assistant, who were nut mechanic*. 8petimena of the engravings, executed by the new apiwtatus, were exhibited to the Association. The next communication watt on the Law* of ptifect musical intonation, and their application to the church organ, by Mr. w H I'oole, which was read and enlarged upon by Professor llenry D. Ko- , ger*. ol Boston. , jc'fi or lake chami'laim?why it dikappiaks all, at once. Professor Olmsted said?I have been informed t>y peisous who huve lived at l'lattsburg and other plucea on Lake (Jhaiuplain, that a singular fact is observed there on the breaking up o! ice in the spnng, usually in the month of May. It is tliat Uie ice all disappears at once. On using in the morning, tor example, the lake la entirely clear of ic?, although the previous evening it waa seen completely bridged over. Being requested to explain the tact, 1 waa led, on reflection, to ascribe it 1 to (he absorption of water by the ice, until its specilic gravity exceeds that of the water, when it sinks lo (lie Union. Although ice, on account of us ctystaline structure, is lighter than water, yet 1 the solid matter itself la heavier than water, so 1 that when the interstices are filled with this duid, the mass liaa a specitic gravity exceeding that of 1 the latter. Thus, sponge, when fully saturated 1 with Mater, will sink in it; and if ice,in a porous J state.be plactd ia water, it will also sink. If the ' question be asked, why this fact is peculiar to the ' .1 I ? L *. I ki.mi.Lin ?,.,l u,l,u .1 .1,,^ 1 not occur inolhti lakes which freeze over in the winter, the answer id, that ou account of the he- 1 vere climate of the north part ef Lake Champlain, 1 the ice remain* oo the lake until the sun has ad- 1 vucced very tar northward, and the surrounding countiy bun become quite warm. 15y alternate 1 freezing and thawing, the ice becomes grtitillated, c and very porous, and, consequently, very absorb- 1 ent of water. When this process has reached a 11 certain poini?that is the moment when the specific J gravity id the ice, thus soaked with water, exceeds J that of the medium itself?the whole sinks, and ' disappears at once. 11 Doctor Hark entirely dissented from the ex- " planuiiou given by Professor Olmsted. , Protestor W. B. Kookhs dissented from the t view expressed by Professor Olmsted, as to the , density ol ice, and maintained that there is no ? reason to doubt that pure homogeneous ice is S|?- ( vitically lighter thmi water. The idea of water a being atile to enter between the molecules of this solid is quite inadmissible. A volume of ice, in its a pure, oysialiue state, when free from bubbles, is no mote porous than a crystal of quartz or cule- ,, spar. In either cane, the volume ol the mass is to ? be regmded ns niude up of the material atoms, and a of luierMi'ittl tpuce, bud the b|>ecific gravity of the , solid includes the whole. These spaces between j the molecules of u mass, if penetrable at all by the liquid, could not be penetrated without an entire r breaking down of the mass. This speci**s of in- a terstice, proper to the crystaline character of the t mass, is not to be confounded with the (Hires or t cavities in F|K)uge, or other cellular bodies. , l'ridessor Henry D. Kookrs followed, with a j view to explain the apparent inconsistency; and the SECTION OP OEOLOOY AND VATTBAL HISTORY. In iliit> section the following subjects were communicated On the structure of the mouth in Crustacea, by Profetwr Lout- Aqassiz, Harvard. Notice of the discovery of a portion of the upper jaw of the Igudnudon, with teeth in their natural poMtion, by Keqinald N. Mantku., London. On a new generic type in the class of worms, by Chaki.es Gikard, Cambridge. On the connection of the deposits of common salt with climate. Protestor Henkt D. Roots*, said there is an intimate connection between the |<resent basins of salt water and the existing distribution of the esrth's climates?a connexion which, fully established, promises to afford us, through a tracing of the dictiibution of the ancient saltferous deposits, much insight into the climates of the earth in the psfct 1*1100* A sound geological theory teaches that the original source of the salt of the great ocean, SDd of all the salt lakes, was in the chlorides of the volcanic minerals and rooks of the esrth's crust. The action of the descending rain is to decompose these rocks, and to dissolve and float away into the receptacle of the sea, the solluble salts which they contain. The geological revolutions shifting at sueeessive times < the waters of the ocean from their bed, have laid dry a portion of the sediments, leaving behind a part of the sea water to be evaporated, thus impregnating the strata with its saline ingredients. Thus we find, that all the marine deposits, however far removed at present from any ocean, contain an appreciable qnantitv of sea salt. In those elimacle regions st the globe where the prevailing winds are excessively dry, and in those alone, do we lind the mli nd, casnians, receptacles of water without outlets, snd all these ci'.sjnaas. without exception, are Ufcina of saline water; snd the reason of thin is very obvious. The constant drainage of the circumjacent districts, has been bringing into these insulsted basins fresh accessions of saline matter dissolved or leached away from the strata over which they flow, while the evaporation under an arid climate, carrying ofT the surplus water, and Lieventmg its flowing on into the general ocean, as been th? means or accumulating in these receptsrles this constantly growing supply of salt. Ily this equilibrium between the drsinsse of the region ? nd the evaporation, the waters hare become at last ao strongly impregnated aa to deposit or cryatalize the aalt anon their tnargina Following u,i Ihe i-srne frnrrul fad of the un"-.??int *olutio:i of the rocks, we behold in the greit aea itself, a bison like the other aalt onea, which has no outlet for ita surplur aupplie* bat back again by evaporation lata the aintoaphere Looking, then, at the primeval condition of an atmoaphare of aqueous vapor ju?t alter the |>eriod when the earth'a general temperature was incompatible with this state of water, it was afresh ocean, and not a aalt one. ClMMM Ao?-?!/, upon tne conclusion of I'rof. Rogers' obse rvations, passed a high compliment on him, snd remarked thai the facts and viewa unfolded, did, aa the author aaid, furnish a newmeana of interpreting the ancient climatea of the globe. Firm the fossil vegetable and animnl organic r? mains, geologists have long felt themaelves provided wiih sensitive indeteaof the paat tem|ierntrres of the rartii at different periods but never until naw had they been au|iplieil with a hygrometer; this. 1'iofrasor Rogers haa furnished The other aubjects were?on utricles, aa the pri- f mordial forma of all anirnil tissues, by I>r. W. J. Burnett, Boston; on a new type of scales in fishes, by I'rof. Louis Agaaaiz, Harvard; on the relation P ofihe distribution of lice to the different fauna, by Dr. W. J. I'.urnett, Boston li This section adjourned at one o'clock. Simon or < iiemimrt amp MiNBaaLoar. The following papera *'re readi? a "The Cause of Fermentation," by Dr. II. Erie, tj Yale Analytical Lah'y. which gave rise to some tl discussion, ia which Prof. Silliman, Jr, Prof. ? hoi fford, snd Prof Rogers, took part < "On the Koostite of New Jersey," by Henry * Wurti, New York a "On American Spodumen," by Geo. J. Brash, . Anal I^aharatory, Yale. * < ?n the Adulteration of Vermillion," by H. d Brown, Cambridge Laboratory ,,, ' On the Dimorphism of Copper," by W. P. /, Blske. Mr Blake's paper slated that he had oh- | tuned cry aula sf emjpn by electricity, which we re c he xagoaal prisms, and not in the monoanetrir form T, aa generally observed And also stated, that he (j had seen native cry aula of copper in b<-xi.goaal ? frisms. a Dr. Jarvson thought theae native crystals might _ be pseudomorpha, snd hoped Mr B would con- ?i tinue the research, aa the results would be of greal c, practical isportanc* t? "On acme Saline Waters containing Baryla and fr Mrontia," by H. Hunt, Canada, Otologic*! (?a- Rl mission? r w I ArrcunodK omaai. hiium tu < i/jiuk "urrt,. At half-|Mat two o clock th?- PrwofMMoolled th? . Aerociation 10 order, and the Hecrenr?, Mr IKr- | , rwk. read the minute# of tho la?t meeting, and l'ro- ! leaaor llorreford rrid the rranr*inenw of lb# Biai 't.ni' ctlrtnilHf Theih#rk*of th# meeting were tote 1 to the I MH><r?>rd Corporation of the ?iijr of Charleston, * I. r their bknlitf in puhlubtaf 'he |?w*#dia ? or tl.f A r?< elation, aad their pre'ebtaitoa of a vo!jn?- ^ of t|,? it.f. w Fi?fe?*?r t >!.*? r*r> tbcn read h<? < <*m?f Nation o? the |?|e periodical ?i<iNti? n of the Aurora bv Mnlie. of which the following ' an aMr>i''t ? ? 'IV leerlirif object of thit l"?J*r t* *# folio *a: ? ? I To e?taMi?h ?l,e fart that we h i*e iu?t d () through an ritr.iorHiiw.rv |*riod of A'lro- <?, (to ^ ? I'll li I intet.?l in n ?e th' name of Vl?t*ti??e,) . *hich CtmmMedia ISZ3 > ad tln*?d is l"IM ? 2. To rteteiimor iIms pharacterwtica hf whirh ^ tl'??e eiliihitK'i.e of th? Aurora diti> r trnni h'- or- < ?1in-ry exhihitione of th* ntve pheiwmeooa, nil ' to ptai e ?.n record n full arid ao i?rat? dwn'Mi-tion i?f ( # ? ral of the n.ott rernaikaMe, a? material* of nmjuiiM-ii in future ?i-iUti?>ti?. !) Tn eataMt-ti, hy in ei?niir? HUlina of ok trratkiM, the |a*e ?>C the Aim** Unreal** 4. Til d. teimiw the origin of the Aurora, and to " ani!'n iJ,# 'rue rm>? > of ih?* pheaolliona Hi o rin to rMilHuh i!?? reality of aii'h an eitra- " nrt'tiarv tl'illlniti, *?e firet 1 uiime nil the f.icta of 1 the rue, ri n' ;>rudr j- a onoi|'lete hietory of the n | he?H't(te?ii B fi-r the [#ti<?| In ifier i n ; nod, h ? r? ftdly, e. infaie the ? iHI-iti >n* of thi# i*rmd tl w 'h ike ordo.ry wtofbyaof the namr* lor the ? a; n < leogih of t?me, ?ii?ni|>'i?# to peo#? that dor- t* ii jr th* jirpiMi 9'iii* it a * ?t*tt?tioa," the aurora* ' |i'?llj eie?ed the ordinary ejl?ibition# of the me- V eor lo niimhor, i?? epWad.r, 10 pe?wli*r ciinthioa- ' I i't? of firm#, ami m a |Knfrr*m i which merka ' leetomor middle, nod en t ft i ? ? rf iL? Au:-:f< M-J wnrnei i by an extensive induction of facta, chiefly gathered from personal observations, we endeavor U) ahow to be the following, comprehending both ?uch aa are generally aduutted to be the leading facta, or lawa, and such a? are deemed somewhat new, or at leaat not universally received a# eatublialied traths. 1. That an Aurora of the first class usually commrncea near the end of the evening twilight, in the form of a northern light, rerembling the dawn; that it ueually arrives at ita maximum at all placeo. Iiowe ver differing in longitude, at the Mine oart of the night, namely from 10 to II o'clock, and more frequently a little before 11 ; and that Auroras of Ihe highest order frequently continue all night, while ihose of un ordinary character commonly eud before midnight. 2. That a great aurora is usually preceded by a large bank, or cloud, of a jiecuhur viqior, differing in us nature from ordinary clouds, commonly exhibiting a nulky appearance, hut sometimes a smoky hue, or the two mixed together ; and that the extent and density of this auroral vapor, resting upon the northern horizon, forms the best prognostic we have of the probable intensity of the exhibition which is to follow, cotn|<osiiig, as we believe, the material of which the successive forms of the aurora are constituted. 3. That the auroral waves, when peculiarly grand, make their appearance later than the streamers and* itches, and ueually later than Ihe corona, continued toa laterhour of the night, appear at a lower evel than the streamers, and roll upward, in the iirection of the streamers, toward the |>oint of 'eneral concourse. 4. That auroral exhibitions ef the higher order ?re eommonly of great extent, spreading over no ncon*iderable part of the earth's Biirface, and reaching to a gitut, hut variable, height. 6. That auroras of the first class have three dis:inct loinis of jieriodieity?a diurnal periodicity, :ommtncing, arriving at the maximum, and endug at definite hours of the night, a? already aserted; an annual periodicity, rarely or never iccurring in June, and the greatest number of the nghest order clustering about November, these axt bearing a striking resemblance to each other; tnd a secular periodicity the most remarkable of ill, recurring in great series which we have denoinnated " Auroral Visitations." That the visitatons most marked and best defined, occur at ineivals of about W> years, reconing from the middle >f one period, to the middle of the next j>enod, ind last from 20 to 22 years, making the interval rom the end of one to the beginning of the next, bout 45 years. <i. That, while the forms of the aurora usually .ppear to be under the control of magnetic forces, el this is not always the case, since the arches do lot alwats culminate in the magnetic meridian, lor do they always place themselves at right ngles to the meridian, nor does the eflect on he needle correspond to the different states of nteosity of the aurora. 7. That the aurora has remarkable geographical rlations, belonging chiefly to the higher latitudes, nd only in the great visitations descending below he latitude of <10 degrees, but descending lower on he western than on the eastern continent, and prevailing more in the northern than in the southern lemispheres. The foregoing seven propositions appear to emirace the most important facts respecting auroral xhibiuons, and are, therefore, deemed to be, in he present state of our knowledge, the laws of the turora borealis Hut we cannot rest satisfied to et this great visitation of the phenomenon?which, n its whole progress and duration, we have enjoyed air opportunities for obs rving?pass by, without in enort to assign its true origin, end to explain he causes of its inyterious phenomena. After the phenomena of thunder and lightning sere first proved, by Franklin, to be caused by lectricity, it was taken for granted, almost with>ut discussion, that the aurora borealis i* produced >y the same agent; and this hyjiothesis has Mill rery numerous adherents. We endeavor then, irst, to show that the aurora berealis is not proluced bv electricitv i?1. That it is unsafe to pre licate an identity of origin, from a resemblance Jet ween the aurora and certain appearances of elecricity in passing through an exhausted tube, and hat the resemblance itself is greatly overrated. 2. rhat such an origin is inconsistent with the great xtent of the phenomenon. 3. That the electroneters do not indicate the preaence of electricity in ,ny unusual degree, during an aurora. 4. That beae exhibitions are scarcely known in the equaonal regions, where electricity ismost abumUnt, nd prevail moat in the polar regions, where thuner and lightning are unknown. 6. That this ause la incompetent to account for the aurora vaor, the material of the aurora itaelf. 0. That the notions of the auroral vapor, in ita corruaoationa, re too rapid to he cauaad by electrical attractions nd repultions, but not aulhcu-ntly rapi I for the lectric fluid liaelf. Finully. That electricity la oadequate to account for the pendicity of the auroa, if not entirely inconsistent with the aecular eriodicity. But magnetism his more claima than elaaticity o be considered as the true cause i f the aurora >orealia, since it ia acknowledged that the forms ind positions which the streamers, the archea, and he corona, aaMme, are intimately related to nagnrtioni, anil that the magnetic needle it->elf ,'onfirms and establishes this relation. Hut thia irovea tnetely thut the matter of the aurora Ins nngnetie properliea, but decidea nothing with reipect to the origin of the aurora, which is the pnn il?l thing to be accounted for; wbile magnetism, ike electricity, ia inadequate to account for the xtent, for the lufht, for the motions, for the mateis I, and especially for the periodicity of the aurora. 1 >ia?ati#fied with the attempts which have been nude to account for the origin, or to explain the henomencn of the aurora, from either electricity r magnetism, or from any other cause of a terriaisl nature, we next look for the MM to the lunsiary ipuces, and arrive at the coqclua on that he utigin ia cosmic*!. The phenomrna of the aurora belong, indeed, o the atmosohere. since tbrv are nflpcifil bv tHe arth'a diurnal rotation; but the aourre ot the natter of which the meteor ?* contxiard. we hol?l o be derived from N^MI dm w Riia diMisction we deem of much importance n inveatigating true theory of the aurora, namev, that the exhihitiona are aimo*|>ii<rri<', while ne aource or origin if coamicul We, therefore, n<i?nre firat at what height in the alimxphere the > n n no I rxbibittoM take i>lacel We concliida that while aome of the forma of the neteor, aa the corona, are unmntable for t hi* in Ventilation, being merely the effect of perspective, yt bat there ure other forme, which may I*- wwd for rallai no leaa than a common cloud, a? the uiyrr ine of a well defined arch, or aome mimic irngiiant of an auroral cloud, unconnected with other *rta of lhe exhibition, and of a form m> peculiar a to arreat the attention of observer* at enme d.jincc from each other. From an extrnmvf c<?maricoa of data, we arrive at the conclusion that he height of the kurnra ia very Variable, acme, iroea reaching an elevation of at leaat IWi milee, and t other time* unrig but a lilile ab< . > Mm r< ifi"n >>f lie clouda; atiU we atteni|>t to prove that tli>- teaimony of Kar^narMin, that auroraa are eometimea ren below the clouda, ia not cooclumve; nor that f l'atrv, Rjchardium, and othera, who have aarrltd that, in the I'olar eeaa. auroraa eometimea I'p?ar brtw-frn th? !?< taior aud ibe ictbrrf*, at httlr dtatance It in rrquirtd of a theory that it be a legitimate eduction of well etubluhrd truth*. nnd it ia reuir?d of a hyioihraia th*t it r?;,|ain the leading icta, and that it b? not incoaeutent with miy n<wn facta. An tiylaatioi which iiniiea the haractera of both?which ia, at once, an iof-- rce fn'm acknowledged truth*. and w hich afford.* n adrquate aoluiion of the leading ph-nnmena, 'bile it ia not iscooaiatent with any known facta. It hough it may sot be re?dy to account fi>r th? m, ?urb a* <>?|>lanation ia deemed peculiarly worthy r confidence ui.til a letn r can h? proponed In rnfornntjr with ih>*e principle* we endeavor lirat > tnfcrthe rmmcial oriftn of the auror? borealia i ra known facta; ee?oixll?, we in * - . a* far ? ** can, th? nature of the bo.ly or h I" n fr >tn huh thr material of the our?ra ia derived; nnd nrdly, we applr the thn.g ihua formed, to the rnrral facta or lawa of th>- phenomena. In the fir?t plafe, we argue the cixm cil r?ri|rin f the aurora; I Iront the ritent of the eihibitiona, bich i? grmter than roul<i artr> from any terr^aal rpitmiiii'tia or aifn<>f|>heric riaitatlnii; '2 i n. the vel-ictty of the motion*. which ?re i<*> real tor mv teneatial fore*; 3. fr? m the nnotrace of the dirt-rent ?t <g?? of aa it irora, (the bei.ninp, w??*'i?n.m wf?H e?it,) at the *?me hotir of ie i t|thi in placea difl- nni? widely in longitude; fich iid'Chtea that nit ?whp portion* of the nlLa' Hirface, ia Ibe dturnal N?tln|, come d?*< r ihe ortyin of th* aurora aiitMtrrf in *pic*{ tiahy, fr?m the perotrtn ity of the exhibition*, te diurnal, whf h ?h< w? a r? Mi.in to the pooitinn 1 fl e ton with renpect t<? the twiftriHl, the dorinal, hirh indiraf* a relnton vf the auroral body to i. ' atthV orbit, and ?-1 fi.' \ tl- - "!*r, whi<-h r | ti* a a r>< le at the nd of whi<-h the anroml ' <1) ?rd ihr ?mih rrttitri if? thr aamr r?lali?" ?iii? n in ihr whilr th?- vrrjr flint>r< ?I ui#k a arrular j*t<rdiHiy t*kra 'b"-i?h?- ' m-iiw. rmi cf ihf |?|f if and | Uc a ' wuh'B Ihr ftI* ?f ar'n n<>itiirnl r f?. t ! llkr 'front |>l?? r, *< iefrf that thr atirnnl | rrtjr, ?li?*nir l|>r mil >i ?l of Ihr aurora ladrnvrd, | i u< hulouft Koily, totifi.-liiiit of net rfiunl/liithi, IV it it, *1.1#, i?-nit?tr?ti?t*rrnt, m fnrtm irntor; ' h! it turn revolution inwd i|?* ?on; tint pro'*- I ijr ihrir arr R flt,^ nrk Wlhtilll* ?f RfRtibM ( ;atirr rtif i? <1 tlirVii^ |i thr , Ihi inr) i' iff a tr?o1utir?n <n.| rn-H of it* '> ?: an f tint r i b'H tnrni t?f ihr aiitoti arif ? Ift'tlW of thnar I mil y otcramnallj into Dm ctrlfripl*f mtatlraei n. lo Mtlwiw, w? rii'IftTH to ?'ioir ilmt thr >??? krr? a??i^r?r,t ami ( ? >? d lo ru?t, is ?H >. Mtr in ?m>nal ft>r ih? W-adiry (ai la wf 't?r cmm-*, I I thr jtrti rit?M ami ??Ifxltj, tl.r p , i iti'-n, ifi*- mHjra* tic relation*. mid !?? yrriodicii: * hitr. in i? M'd in th niim r fart?, it * 'ii^on- ' fcl-? fl |.< I , i.'' #> :'l? } i* U f d, V : explain them all until all the modifying eircuini luneri are fully understood. [i may be remarked that there is, according to uiy view*, agreat analogy in the origin of the auroia ImmvmIim, *u<1 of meteoria showers. 1 hope, her? after, to he able to develope this analogy more fully than can be dene tin the present occasion, and (o investigate the question of any poaaible connection with either phenomenon und the zodiacal light. lnvcubtfion* on the communications at afiernoon tecsious being excluded, the reading of the next paper wa8 called for. Lieut. II. C. Davis then read hi* observations on the Nautical Almanac. Hp commenced by stating thut Congress had evinced ? determhMlion to establish a Nautical Almmiac, by appropriating a mall sum for its pre|>urution, of which he (Lieut. l> ) was called upon to superintend; and he felt that, while the work served ih?* present purposes, it should endeavor, also, to improve the meana of sale navigation?that hi* own labors ahould be turned lo the beat account, in order M render the predictions the most valuable to the practical aationnner; that it ahould make worthy contributions to astronomical science the moat honorable term of acknowledgements to those upon whom they have nil now de|>ended; that it ahould add iih own testimony; that noble science was not neglected among ns; and that it should promote . he pursuit of that science by encouraging, and in some measure compensating, some of those laborer* hi this field, who, though eminently worthy oi ibeir hire, have as yet borne the heat and burden of rhe day, without any other rewurd than our gratitude for the honor they have conferred u|khi the eonutry, and that good name which is better th hi richer He considered that it belonged to his office 10 adv nice that which is, and always lias be> n. the principal object of astronomy; und that ir, in ilie language of Bessel, to supply precepts by which (tie movements of the heavenly bodies, as they ap|iear to us from the earth, cnn lie calculated. All else that we can learn of the heavenly bodu-a-for example, their appearance, or the uatute ot their surfaces?is not, indeed, unworthy ?f aitenti u. but does not embrace the purely ahtrouoii h'hI inte rest. Whether the mountains of the moon are tunned in one way or another>is of no more concern i?> the astronomer than is a knowledge of the mount mis of the earth to one who ia not au astronomer Whether the surface of Jupiter exhibits darker bands, or appears euuallv illuminated throughout, engages as little his curiosity, and even the four inooii* themselves interest him only by their motions The problem that has been, ami is to be by Mironomy, is to acquire such a knowing of rhe motions of the heavenly bodies as to be able to give a satisfactory account of them at all tunc*. Lieutenant Davis then said he had procured ?li<- co-i>|>* ratios of Professor Pence, of Cambridg', to whose talents he paid a high complimeut, ami ulso that of several others ol scientitic eminence. " Suggestions on Cliiinges of Level in North America, during the Drill Period," by Professor C. 13. Adams, tf Amherst College. He said?it is not the design of this communication to discuna the glacial theory of drift; its object requires that this theory should b? assumed as a fact, and used as a uoint of de|>arture. The objections to the glacial theory lie agaiui-i the origin of the required glacial sheet rather iban against the dynamics of the theory $ while the objections to the other theories lie against their dynamics with a serious if not with a fatal force The suggestion, therefore, of a possible cause of a vhm glacial sheet, 0,000 feet thick, may not be uselei-s, even il somewhat improbable. The hypotheeii- n- this, that the glacial sheet was produced by a umt elevation of land in the northern regions above the .resent level. Besides the direct refrigerating influence of elevation, the flow of the tropical waters into ihe North Atlantic may have been essentially diminished by the contraction of the area of the ocean. This contraction must have been much greater, if, as is highly proj>able, the similar levation of Northern Luro]ie was synchronous with that of North America. Whether or not this elevation can account for the origin of the glacial sheet, there is direct evidence of a greater elevation than the present during the drift period, in the continuation of ihe drift strise I beneath the sea level, for it is well known that glaciers cannot advance intothe *ea Unfortunate us from the knowledge <>l Mir unut important fact? the greatest depth at which strie exist. The passage of drift materials across bwint which are now filled with water, sugt.'> st* <he same conclusion Such of the right mtlenals of Cape Cod, Nantucket, and Long I aland, ax could not have been taken from the mainland by marine agencies, must have been carried by gl?cial agency, and consequently the intervening bumm must have been above the aea level. The p isaige of the (lacta) heet, acroaa the basin of Lake Superior, presents some difficulties, which ate diminished by the theory of elevation. The bottom of this baain is now. at leaat, one hundred ,iml sixty-five feet bent at li the < a level. Without elevation drainage would have been impossible. It is eaav to asorrtain ap >roximately, the amount of submergence which clos-d the glacial period Submergence to a depth of not leas than two thousand feet below the prevent level effected the dissolution of the glaciers and introduced the pleistocene period. 1. The general proof of such submergence is the present existence of altered drift at a corresponding elevation. 2 Special proof is found in the existence of near* at great elevations A senucirnil tr one, well chiracterized, occurs in the town of Peru, Vermont, at an elevation between one nnd iwo thousand feet. 3 Other p|>ecial proof may Te foun 1 in the lines of sncient sea margins, which are much more rare than the ffuviatile f-rr tce* < ! a later dale. Such a margin was found by Presid-nt Hitchcock in Pelham, Massachusetts, at an eletation of one thousand two hundred feet 4. The most forcible argument is derived from the existence of regular atr?'iti?-l d<-|>o?ta of fine sand and cluy at the aumuiit irw i of longitudinal valleys. Professor Henry I>. lingers, of Dos:on, thea tave his ohsenatiou'- <>n the coal formation of the 'nited States, and especially hi Pennsylvania. I rimnoi givr, in mia ? "iiin.unic*!!"!!, rvra ool line of thr PtofrMOt'a imauia and able observation*. This wait follow# .1 l>v *if wa on thr nrwW dootrd in lh? coaat aiirvry, for charta of cam-nia, hjr l*rofrMor A I). Mac lie, .v lytnutcndal of tl?? U. ?. I'onat Survry Ob thr velocity ol thr ynlvanio current in the lrl? Kra|>h wirea, by l)r II A Uould, of Camliridge. Thr following ar?- illr vi?'w* nf i'rufraaor W. U. Hoocaa uiion thr ditlrrrni mwurra of mechanical nower. H? referred to tli* writing of the late FroIrrrorHobinaon, of i.dlnouruli.M ,'m., ?a he irliert*, had fin>l *et in a rlmr ami |'IiiI..>i>(>Iiu:?I light tfcf origin ol tlir dtflrrrncr, a lot Imd liowti thai, properly umler*too<l, thr two liieaautra ?rni nlirely coincident. Ftof H. th-n proc??drd to r?p|?ia thr i'*p which, in monliiiicr wnh t'rof Ki?t?i?on'a r?|iOMiion, lir had loriK Iwm accuatomrd I? maintain and trach ll?- illuatiaird lit.- <iifter*nrr N iwun thr two mode* of ineaom lug power, bjr thr rxamplr ol xn nriow , hot v. rti< il!> upward*, and a cannon b<ll rli-< Im m,i ni.i?a ol homoprnrotia wai or wiMtl. 'Ih arrow whrn diailmifi huh n di nt . will .i**in1 ton i]tiat1ru|.lr hriuhl, an i a cannon hnll ?h?i with m rtouMr >rlocitv agaui?t a ltitr? of ho:n<igeMenaa wai or wood, will ,? nitrate to ijiMftrupte depth. In both c??< t> it i> i(, i iii it (h?- n??aa, moving * ith a doiibl* vel... Ity, will f tjnirr thr rr otunf e I?| Iw I ol. it r I for a rtout'lr |.inr, m ordrr that it mi) lr l>roiight to n al. I leu *, h t?in l ft rltrtihle vrlority, anH a double tone of motioa, thr pat r ?Wi rit* n it.-ir ! . j., lr>1, Tlt i?, m ht>th raara th* wmh rloiir, iha*. ia, ihr prodn 't of thr ij .f into th' h ; .. !, tari-a m thr aqtmre ?f thr V> locitJP I'roft a??.t K . n ffinnii in iK? ? ? <J *-?? in iwi lixnical nlijMH to the poa"'I 'mn ki u?i al him u* |4i)mrw< >( t|??- trumftr* i'ift? of power. Thm lb*' Mlrtnf im?r< r ip * HiMmrt fntiiy, nmnfihinf Irmn nnr nut*, and rapaMe, if were, ol h wig piaaed off o another Thna, n h' l? in ni tn?ti, vtukinf a Mwtjr hi ifti, and t!?u?iiitf it to to iriu>?KT it* motion lo the vt tx r Hut ** ,?>*rr and motion ire hut conditional a 'ire ni iltrr, it M>*m< un|4ul<> o|>lnc*l to ?|*itli of lh? ii h' lii? '-.uivryid fr.iin one toidy to anoilirr I'ow.-r iiMJt hr eicited or hfciij'ht into i'l iy by lli' at, '-.'h of on? body to within a 1-rit.nn di-'mre . wtioth>>r, >ind motion than I* run <1 ( ? ih<? menial >. , ' i?f the |>roiima'e |*r?a : ho' n th'? ca-?- the <tlm?ni?Jt'd imKm* nf the trtfcinf ?? ?fy, and ibr acquired motion of that | tr?k.ii-lf quo hml, are ?,tn II,. reiwlta r.f thia i'd 'i" ii ' injf lindy Cinaot h? ronetderrrt aa Iranifernng talirr motion or power lo the ntlw r. t >n TuerdaT errit HIT the aoeiety were invited lo he holier IWee-T .H?l ?? iff, <ah?re the* ?r*tw koejiifnHy en'??Uir>?il. Tii? I l.ea contributed Irir fair fl>?te to '.lie rm.ivi l 4 i l lia MV < mtlM In tn in atirm a el<>cr miM, Mi, |?mM*. a a*tf1 n.orr ffi? wdly nfi'l* r?t ia.lio*, ninoaz lie firrml ' ia of thi? f.,?i ^r? v, ir,/ a.< "OtiAliwa. The t?tra?dimry e?(*iJiu?in of the New York f/M,? 7, U| | . I-1 .. U ' 'fl 'lj< Of lif Ant'fi"m Afni ulinn h< Id in tl.w city ?p In >il o"rlo<-k, thick amounted to n?*rlv four rloaely natei| ciilari na i.f report, and which cmM sot iiir Ih nrrn i?r?l ?t the oflir* in New York till art totdr'ukf, h<ia created ?>ry faeral aurprtrc iere, aril m?n? ha?e en>rean d th?u admiration if !h? admirable ?v-tem < f m niir-mrnl whu li ?uft l>e nWttfd in ihe eatablialuiie t to aecootliali rat k a fril. f v t:\HO MNMRi At I'alf part ?e?? 11 (i'i-Iih k )e*t>-r<lay errntnf. itj'hlv trotortam and mtereatiaff cofnmaaicatioa on he trlcanoa ?f f'ettrnl Aroer.ra, *Nfh r>h*er*atio?a lithe |enfr<|l,ii<il aad toja-fachiral fratare* of Niif'l It 1} L 4 - ,,