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The Tribune Radio?News* of the Air Routes?By Jack Binns
Beverage Wire Removes the Static Pest Aerial Fqual iu Lenglh to One Full Wave Length Sueeesafully Ueed to O vri'f o m e Interference I Is Dirrctional in Effecl BfadeAmateurTrans-Atlantic Test Sureepj>ful on Less* Than One Horoepower A -very rrmarkable neiial 1ns been devis^d ^hich has greatly insvensed tho efieifpey of trans-Atlantic wireless telegraphy. It is known as the Bever xc-p ?ntenna, and its use has mate rially- reduced static interference, in fact so much so that engincers art perimenting with it for use in the re ception of broadcast radiophone en tertainmenf. The. most notable achievement of thr Beverage antenno wa = in December of last year, when Paul Godley, the famous American amateur, used it in Scotland on the oecasion of the amateur trans Atlarftfc radio tests. With this type of neriaf/iodlcv succeeded in receiving no /cwer than twenty-seven different American amateur stations. overy one of which was using less than one kilo watt.of power in their transmitters. In his report of the test Godley wrote: "On Wednesday the 7th the 1.300 foot strcteh of line was completed. the wire being - supnorted by 2x4 inch nosts twelve feet high and Isid out to point Hirectly toward Chicago. The wire wa-> groufided at the distant end through a non-induct;ve resistancc 1 2.",0 to 400 ohms) and at the home end through a variaUe inductance of the order of 0. 1 microhenry in value. This consti tutes the Beverage antenna. Aerial Equals One Wavelength "For any given wavelength the wire should be one or two even wavelengths long. Arrangements were made to changie the length of the wire, it being necessary in each case to sbift the non-induot lve resistance nnd ground connection from one suporting pole to anothvr. "Signal potentials built up in such a wire are approximately equivalent to those which would be built up in a ver tical wtre one-tenth 1 at most; of its total length. When working at 200 meters and having a wire length of au proximate'y 660 feet 1 one wavelength). signal potentials produced in the wire would be equivalent fo those produced jn a vertical nire 60 feet in height, or, if the full wire were used, 1$0 feet in height; at that wavelength. Furfchefr moie, the system is highly directional, and eliminates a great poi tion of the atmospherics and interference" comihg from directions other than those from which one wishes to receive. "That this condition did exis; wns rroved by eomparison with a *mal! ver tical wire ,,upporif(l by a nearbv tree. Static to <Agcal ratio in all cases was tiecidedly better 011 the Beverage wire.*' Of course. it will be seen at the 0111 set that such nn a'-rial cannct be used by every radio fan, because of i;; great length, and the fact that only a few persons, comparatively speaking, can erect such a long wire. Aerial N'in* Miles Long. Terhaps the best way to explain the operation of- this type of antenna will be by describing its use in connection with tbe giganfic station at Radio Cen? tral. Riverhead, L. I. This station re ceives from tbe long distance European stations which are using wave? lengths ranging around 15,000 meters in length, or. in other words, each elec tro-magnetic wave sent out from these stations is approximately nine miles in length. Xow jn order to fui fi 1! all of lhe re quiiements of the thcory covering thn eperation of the Beverage antenna, it i? necessary to have a receiving aerial one fqll wave length long. or. in othrr ?words, a receiving aeria! nine miles in length'. This is exactly what has heeu installed at Riverhead. The aerial is rune miles long, and is sunported on poles thirty feet above thc ground. one end being grounded through a non-in Hnctive resistance. and the other through a variable inductance. With fthis wire tbe Riverhead station is dailv receiving five different European sta? tions simultancously without interfer? ence. -.. In flesigning this aerial advantage ?w-as taken of the fact that static is to a certain extont greatly loeali/.cd. and also rvf the fact that certain tvnes of ner:al*sre very directional in" effect. The non-inductive resistance at one of tbe antenna goaks up thc interference and passes it to ground. Static Is Immature Lightning For^ instance, static is lightning in the making. and a congested center *uch as N'ew York. with its hcated air Tising from th.e big buildings, pro duces?a great quantity of local static. This would be n very serious situa? tion -for Riverhead but for the loca tior. of Xew Vork, which makes a Beverage antenna very effective in <>liniir(Bting this local static, as thc fignal-s are coming from the opposite clirectioti to the static. In vrdcr to illustrate thc operation rf the Beverage antenna G. H. Clarke, an cngineer of the Radio Corporation! has drawn th.e following analogy for our r^aders: "If?we look upon the Beverage an? tenna- as a large lake,'-' he *-:ay.s, "and the wifffc as the static. wc ran get an idea how it works. Now, suppose the Wind ir blowing ncross thc lake from east te-west. At thc eastern end there ?will b*e "little or no ripples. but as we get to the western end the ripples will gradually increase in size to full Waves. If the shore at the we?tern <nd is a gentlc siope of sand? gravei tho waves will bc dissipatod "^nd wJU not '?>?? reflectcd. "If, on the other hand. the hore 01 tne iake is prceipitou.-; and rockv thc ?waves will be rcflocted and wii! flisturb tbe rnstorn end of the lake. Kow the Beverage antenna. ha'-'mg a ron-induetive resistance at its non recciviri.e end. eorrc-aponds to a sancly nA.?n , i.?5u.<o it absorbs thc static end intcrfering waves and does not reflect them. Auaiogy Ehtplain-a System. "Carryit-.g tbe analogy further. if we place?a itationary padole wheei at \he ' ?western end of the lake, which is rr-1 volving uniformiy and producing; wave4 ?r a uniform character. these I wave* will travel steadily forward to-i ward 'the onstern end and will not he ; H.terrujited by or stopped by the wind. lhis*paddic wheei correinonds with I the transmitt.irig station ar.d the! vaveg it sends out are equivalent to Making Moves in Aneient Game Via Ether ? .. y.-,.: -.:.:' . ? photogrxptur Faid, "Photo shoics Miss Rosalind Kendall. of i\etc \nrh. calling her move, while her fricnd in Chicago sends bach by radiophonc." In the excilcment of the tnomenl she forgot to put thc trattsmltting tttbes in thrir sockets Britain to Let Down Barriers Against Home Radiophone Sets Marcohi Head Dcclares England Will Give America Good Race for Supremacy When She Starts; Claims Snperiority in Tube Sels By Warre B. Wclla I rot.i Thi rriVunc* Europea ? Bvrea i LONDON, April 21.- England, which to-day can claim no more than a few thousand radio fans against the million of the United States, plans to start in on the business right away and show America just how the radio game should be played. The authority for this statement is no less a perr.on than Godfre'y Isaacs, managing director of .'larcjni's vVire less Telegraph Company, who has ju3t arrived in London after a vis.it to tbe Contiiicnl. i-.-u>:cs Ipoks forwriV'd lo lhe time when thfer'd is jrolng t<> be a radlo reeeiving set in "very Englijlj home. . and this time is coming soon, he says. ^ !i;;' '-' the matter with radio it: England? Why is this country 50 far in -x;c',i an inferior nosition to the united .state-- in wireless development? Godfrey Isaacs answers these questions in two worda- "government control." lhe Use of reeeiving apparatus by private persons has been made almost impossible up to the present bv the cont nuance of the licensihg system bv the Postoffice. . British Well Aheud ls Claim Thd position in this country. it must .)?? allowed, ha.i been a little different Irom that \rt the United States; wnr time eomiitions have necessarily given a point of view that tiie American au? thorities have nol had to take. lt is not due. it is claimed, to anv lack of technical skill 01 knowledge that wire? less telephon.y ha? not made anv cbm paiable strides over here. British ex perts are not one bit behind American and in the handling of valve rec^ption and transmission are possiblv fn ad? vance, it is said. Tbe one difficulty has been the ofticial restrictions. Now. according 10 Godfrev Isaacs the postoffice is going to change its policy and to hUo.v every facilitv for the extension of wireless telephony. Ai. important announcement is ex? pected when Parliament reassemblcs And when thc restrictions have i,e.'n removed or modified there will be noth? ing; to prevent a very b;.; advance Godfwy is:,;h:^ thinks that govern ' ment control in the earlv stages of ( radio 111 this country may turn out in I tbe enn to have heen a cnou thing He ' hoped. he said, that England would take the new extension in a more seri | ous and sobor way than it had bee;l . taken across the Atlantic. "I don't ; want to see 'radio fiV here." remarked | MarcOni s managing director. "fn , the waves from the European station. "The tcsts t'nat have been con j ducted at Riverhead completely con j linn this theory. When we placo our j reeeiving apparatus nt thc- end which ; is ?Tounded through the non-inductive i resmance it is impossible to hear anything hut a terrific roar of con | tmuous static discharge. Using thc wire properly as r. Beverage antenna tve are able to conduct trans-Atlantic | wire!,.*:.-, communication without any ! difficulty whalsoever, despite the static , 'These facts nre so significant that J we arc carrying out a series of c penments with short waves. These so , far are very promising, but as Vet arc : r.ot completc. and until thev are we . do not mtend making any announce 1 ment concerning them. , ?'Of course. rye reaii=e that neoolo dwelling ir, cities cannot erect Hev ;erage antenns, nnd coPsequentlv we are seeking some other means to "over ' come tiie.st-.tic situation so far as they nre concerned. The Beverage antenna suggests several promising methods wh cn wc hope will^olve the probkni." jUnion Collar Radio Set Increased in Range Trajif?mjtjin?r Ae.paratus of tbe Student Bcdy Now t acs One* HorsepoMcr By Lewis B. Sebririg Jr, 73 U-iiion Coillefrc. Radio bfoaJca3ting 'na- i'ntftfduced ? ti ie people or ea.'tc-.-, v(.,v york [-state by thq Union College RaqMo Clulv | 011 the nighi of October 14, 1920, when . phonograp,, music was sent throvtffh : the i.ir to p -onio within a 100-tnilc ! tadius of Schenectady, -N V? home pf the coitege. For th" next two month* 1 this station, conducted entirely by I college studen*s. v.-.is the first oiie -iii the Uuitod States to regularly bioad ca?-ii .Tiusieal programs. Soon After the s?.*r.t of the first commerctn*}brrnul- * casting station tbe Union radio oper ators add^d to their Weekly coiic'erts complote Sunday tiijrb.t church serv? ices, with college pro?ossora giving the sermons. Although radio work is entirely out sidi" the regular curriculum fbflowed at Union College. it bas grown in im portartce until at present it is consid ered on,? of the foremost activities nt the institution. Since they sent out the first program in 1920 the students America the boom is niAier premature. The equipment in use is rather primi tive and not such as we should like to s?r employed here. 1 think that America is going ahead too fast in this dircction. and I can focesce chaotic conditions if iPdiseriminalo and vast use 0f wirelcss telephony comes,"' he added. Marconi "Lying Lo?" Outlining his company's plans as soon as the Postmnster General gives faciliti.es, Godfrey fs:<ucs said: "We have been lying low for a long time, spending many thousands of pounds in research and improvement, and no country in lhe world is better cquipped than ,we are to-day to put wirefess eommunicat ion into general use. This is not merely a seheme. We can do it as soon as we get the word 'Go' from the govern'ment." Tiie Marconi company's plan is to have broadcasiing stations, say two or three. in differont parts of the country, and to bav? a program foi- diffcrerit hours of the day. lt wil! transmit by particular wave lengths, which will be so confined as to reach only those who use particular receivers. This, in lsaae's view. will avoid the danger of cacophony, which mny hc experienced ni America. Ile propose s thai receiving sets should not be sold outright, but hired out at a charge which will not bc more Aian the cosl of present telephone in stnllations. The American practice of selling the apparaius i?. he thinks, a groat mistake. Modifications, he points out, will he inlroduced in the apparatus from time to time, and once a man hsd boughl his set he would not feel happy :''. soon after. he had to buy something better. Experts here agiee emphatical !y with his statement that scie.ntifically Epgland is able to do everything ths;t is done in America, and to do it on sounder lines. F.ngllsh Press Backs Plan The British press is rapidly lining up behind tiie drive. "America," says ?-?ne paper. "has already embraced this new era with both srms. Just ns it seized the idea of the film with eager ha.nds, so it has gripped the idea of a wireless telephone in every home. American imagination, American in itiative, American eniJi'gy are driving the new era along at-u gallop." What does t'no wirelcss telephone in the home mean? asks another. "lt means n great. new industry, astound ing extension of knowledge, immeasur able sources of entertainment, better business facilitics, new political melh ods, an end fo homc isolation and dullness. "Step into the homc telephone era." That is the new English slogan, have succeeded in reaching, via the radiophone route, practieallv every state in the Union east of the Missis' sippi River and north of thc Carolinas, to say nothing of. .many provincos ln Canada, and ships far out on the At? lantic. The old license. 2XQ. which becamc famiuar to hundred-, in the vicinity of Schonectady, has been supplaiUed by license W KL, under which the college is now broadeesting regular Sunday night educational programs. The week? ly programs are now such n ? might be expected from an ?educational inatitu tion. ln the matter of apparatus the Union Radio Club is particularly well i equipped. The latest addition to the sendmg station. and the sei which is \ ttcix being used to broadcast under WRL. is a I-kilowatt phone set, u<;ing i four 250-wa'.t trapsmitting tubes. Thc principal item of fche set is a 2.000-volt direct current gencrator, installed in the electrical engineering building of i the college. This give.-, the set nearly four times the capacity of the one : formerly used and about twice the ' sending radius. The antenna is of lhe j fan type, 60 feet bigb and 70 feet long, with -adial count?rpoiso and buried I grounds. What the ftji.ure' holds for the st.u denl organisr.tlon i? ns much u matter of conjeclurc as \* is v. ith thc iarger commercial' broadensting stations. It I is tho wish of thc nien now to continue : as far as possible a nrogram of Instruc fciyc ts'lis. Tbe work is gladly dor.e by : the college men as a pnrt'of their! 'te.-]tra-curriculuni activity and is wholly ' without compnsation. The apprecia-. tion of vndio amateurs within a hun dred-mtie radius was appu'-ont in Jan-' U&ry of this year. when at the invits rion of the Union Co'leirc wireless men l about 300 radio fans gathered .from the i ea'pitel di-rricl io stand the first1 cwlio convention ever held in eastern Nev,- Vork State. ... | Bariio Taughl Schools Now! An innovotion in tbe Chicago public j sfbool system will be the 'inslructor- ; loiJ-" einssroom. according to Peter A. ! Mortenson, superinte.ndent of the pub- | 11c schools1 of that city. Inotructors will lecture into transmitting stations at ,' central points. making it possible for one instructor to serve a number | of classes. The classrooms will be equipped with radio receiving sets and loud talkere. Many subjects will be in cluded in the new plan. Mothers at home may tune in on the lectures and get a pretty good idea of what their children are being taught. Reflected Wave May Reduce Interference Pogftibility of Developing Earlier Experimentg Ie j Suggcstcd as Means to Eliminate Congestion! Would Need Less Power I Such System Would Increase Secrecy of Publie Radio Telephone Convcrsation What are we going to do when every available wnvelength in the ether is occupied? That is the question which is causing the United States quite a lot of concern in tha endeavor to bring order out of the present chaos which eharacterizes ratiio communlcation. ln fact. the problem i< univeraal, and it will undoubtedly be the chief topic to br discussed at the next meeting of the International Radio Convention. To thc novice perhaps the situation does not ap,tear to be so difficult, but it must be reali'/.cd that. the number of wave-lengtha which are theoretically at our disposal are not actually avail? able in practice, "due to the fact. that tuning is r.ot 100 per cent efficient.. Theoretically there should be 300, 000,000 different wave lengths avail? able. but in practice at the present time there are considerably less than 20.000, but. even these are badly congestec. and with the advent of broadcast radio-phone entertainment the r.onges tion is becom'.ng worse daily. Engineers Will Sotv* Problem The problem is not merely one for t'r.e lejrislators. Their efforts can only end in regulation, which of course will only ameliorate the situation and not solve tbe problem. The solution lies in the hands of the radio engineers, who will have to devise apparatu* Which will eliminate a great deal of the present Interference, and at the same time give us a greater number of available wave lengths ?o operate on by making tuning more sharp both in lhe transmitting and receh-lng stations. In theory it. is possible to operate! for instance, on every individual wave. length between 860 meters and J'.TO meters, but in actual practice this is just a wave b?nd. and uil stations op? erating on wave lengths within those two hmits will interfeve with each otlier. 'I h" advent of continuous wave tel egraphy ar.d telephony has done a great deal toward maklnR tuning shnrper, s0 ' that Wave lengths fairly close together can operate without interfering with ; oach other. but the condition is by no rnrans ideal. The situation offers a wonderful opportunity for -the inventor, partic? ularly in view of the tremendous pub? lie interest. in radio, nnd eonsequentiy the reward will be rieh for success. ln this respeet it might be pointcd out that one of the solutions could pox sibly be reached by cxpcrimenlation along abandoncd lines. Why would it not he possible to inve?,figat"e the pos sibilittes of the reflecton of elpciro magnetie waves'.' It seems to me there is an opportunity there, especially for wireless telegraphic work and radio telephone inlevcommunication between two fixed stations. Waven Can Be Reflecled What I mean by reflection can be ex-, p'ained by giving an outline of some of ?the early work in the development of wireless. lt was discovcred early by the origmal experimenters that ele'etro magnetie. waves were practically identi cal with light waves, with tho execption that they were very much longer and, consequentiy, -cvare not vlsible. to the human eye. In every other respect. however, they were the same. ns light waves. It was found that they could be reflectod, rcfracted and po'larired, just the same as light waves could, al? though, of course, the methods for ac complishng this were different. When Marconi lirst began his experi rr.enls he used two huge reflectors on his transmitting apparatus to "reflect" the waves in a certain direction. The development of wireless naturally took place on the sea, and reflection wns quickly abandoned, because of the bet? ter results obtained on moving ships with the system of sending the waves out simultaneously in every direction. Now that radio is so highly de? veloped, a great deal of congestion could be eliminated by the use of re flected waves. By this I mean the de? velopment of apparatus which will focus the waves and send them out in one direction only, just in the same I manner as a beam of light ls focused in a searchlight and sent out in a straigbt line. ? - With such a system as this for trans-Atlantic communieation. for in- , stance, all the cnergy of the transmit ting station would be utilir.ed where it was most needed. and tbe present loss from radiation in all other directions would be eliminated. Thus less power would be requircd to bridge the dis- j tance over which it was desired to com- I municate, and furthermore the station } in question would not intcrfere with ; others in the area in which it was not requircd to operate. As we are about to have trans-Atlantic ' wireles telephony, such a directive sys? tem would be of material advantage, not only in cutting down the amount of poiver requircd and eliminating un necessRry interference, but also in the matter of secrecy, because it would nnrrcw down the number of stations w.hich could listen in on the eonversa? tion that waa passing between the two stations. Women Form Radio League Th* Women's Radio League of America, Ine., held ils flrst annual meeting on Tuesday evening, May 2, in room 907, Y. W. C. A. Building, Fifly thicd Street nnd Lexington. Avenue. The followinjr officers were elected: P/esident, Miss Abbio Morrison; vice president, Mrs. Elenhor G. Regan; sec? retary. Mrs. J. Koch; treasurer, Miss Elb.abeth Rbodes. The regular meetings of the league are held on the first ar.d third Tuesday ?M'enings of every month at the abova address. Code practice for thdse who wish it is at 8 p. m? busineis meet? ing at 8:80 and the speaker of th* eve? ning at 9. At th* next meeting, on May 16, A. H. Hebert. ah offlcial of the American Radio Relay League and member of the second district executive council, will speak on "Co-operation and Or ganization." All. women interested in radio are invited to attend these meetings, and if desired eoursea in radlo telegraphy er telephony ean be arranged for. They Call lt "Radio Flu9i in England $&f.KgW%&mX%?SS$&i-7/7:. ?? -My-.. !.. .,... ,7-7.;-:.-!. ? 7 r? ? -.-..-. Wf.'' . :. . % The picture shows Frank Walsh. n young British amateur, playing a game of chess by radio. in liis home at Brighton. England. He has just tcirelessed a more to his brother in Paris. Radio is being rapidly popularized in Europe The Night Silence Reigned In the Ether About New York An Amateur Describcs Historic Occasion When thc Nightly Jargon of Amateur Conversation Was Stillcfl in the Facc of Disaster By Charles William Taussig Ten or tifteen years ago were the pioneering days of th- radio amateur? in New Tork. That was tbe time when John Grinan ("J. G."). Walter I.cm rnon f-'W. I.."), Vermilya ("V. ':?'.." f "W. X.." "J. X.." "A. F." and many others held nightly conversations over the ether unconfrollcd By the strong arm of the law. Waves were as broad ns they were long in those days, with no limits to length. All night long you could henr the Xew York amateurs talking to one an? other. The air was full of pleasantrics, foolishness, bnntering, squabbling, qunrreling, fanuning, in both the Moise and Continental codes for at that time both of these codes were in use on thc wircless. Thc Tower of Babe! ran a poor second to thc ether ten or tifteen years ago. But there was one time. when disas ter oveitook the steamship Titanic, that the ether was clear. It was nn the night of April 15. 101". Xew York' little world of ethcY waves the day be? fore was in its usual turbulence. It was impossible to get a message khrough the babel of amateur chatter. The usual flippancies went on among old radio friends. as was the custom every evening, wkh no one hearing th? fp.r cry from the vast space of th.e Atlantic Ocean nor the answering call of the succoring ship, the Carpathia, which came to the rescue of the sur vivors of thc sinking Titanic. Static Held Up List Xew York's little radio population was aghast tbe following morning when reading of the cata-strophe. Each thought unto himself, "How can 1 be of some assist.ance'.'" Little by iittlc news was avriving in Xew York giving tiome of the details. The newspapers told us that the nnmes of the survivors were being held up due to the severe static difiturbanees. and when night, came only a partial list. of the sur? vivors bnd reached Xew York. Without being told and witb no oi ganir.ation to get, them together, tho amateurs of New York and vicinity dis? covered thejiart that wns allotted to them to render assistance in this trngedy. At 8 o'clock the evening fol? lowing the sinking of thc Titanic, wh?n 1 picked un my telephone receivers and tuned in, I wns not greeted by the usual din and noise. but in its stead was an oppressive, awfiil silence. Ex? cept for the mournfu! rumblings and grumblir.gs of the static not a sound was to be heard, and yet every ama? teur was at his post with the self-im posed task of trying to copv tbe names of tbe survivors of tbe Titanic that the U. S. S. Salem was trying to get through to tbe Xewport (R. I.) naval station. 'Twi.xt static crashes each of us was copying tbe names of those who were fortunate enough to be saved. Hou;' after hour we copied what lit? tle we could get. for the static would at times-completely oblitei-ate the sig nals from the Salem. Twice during the long period the silence. was broken ? once by tho German station TWT. in the Trinity Building. on Broadway Hardly had their loud spark been im ? pressed upon the ether when the steri lorian spark of Dr. Hudson warned them to keep out. Dr, Hudson, an ardent amateur, was the self-appointed patrolman that night. nnd his spark was the law, with no one disputing its authority. Once again during the night an amateur sent out a call, but he also bowed to the renroving sirjnals from old I) R. 'Throujjb the night we laborcd at ou'r lask, an*J when morning came our frag mentary reeord ot" the messages sent out hy the Salem, pieced together with the messages copied hy the Newport naval station. ennbled th.' newspapers to publish n full list of the survivors. ?????_ Govermnenl Will Give Advice Om Lighining Proteetion Radio fans should give heed to fire insurar.ee rules in connection with the "hooking up'' of radio equipment. otherwise the rates ,,n their proper? ties may be raised or the insurance re? fused entirely. warns the Bureau of Standards of tbe Department of Com nVerce in calling attention to the fact that lire insurance regulations govern ihg the installation of radio apparatus ar:- to be revised. According lo-the Department of Com ruerce, the rule which has beretofore covered radio ihstallations is known as Rule Sti of the National Electrical (rire) Code, and in connection with a Ren oral reyision of this code a change in this rule has been deecided upon. The matter i* being considered bv a com? mittee of the National Board of Fire Underwriters. The Department of Commerce has prepared a mimeograpbed circular con taining tentative requirements which have been suggested tor adoption. It wiTl probably he a matter of several months before the definite require menfs are decided upon. but in the meantimc any one who has teal use for the above-mentioned circular may secure acopy by writing lo the Bureau of Standards, Department of Commerce, Washington. D. C, for their letter cir? cular No. 62, "Proposed Revision of Rulo Sfj of the National Electrical (fire) Code on Radio Equipment." Wil |am S'. Boyd. chairman of the Xationai Fire Protection Association, 175 W. Jackson Boulevard, Chicago, 111.. will also be g'.ad to receive any suggestions Cojjleges to Exchange News A wireless news service has been planned by the Harvard Wireless Club. An rlfort wil! he made to co-operate other universities in broadcasting in tercollegiate news of interest to the students and nlumnae. The club is equipped with a set that will transmit 500 miles and receive any station east of the Mississippi. Schedules of the service and naipes of those colleges co-operating will be announced later. -? . ... Statr* Police to Get Radio Tbe supcrintendents of state police of the ste.tes of, New York. Massachu? setts. Connectieut. Penn.<?\ Ivania, New Jersey and Michigan, in conference in New Vork, seriously discussed tbe ad VisabiljLty of equipping their stations j with radio systcms. A system has ' alfeady been installed in Pennsylvania ' which will be officially teste'd this' week. I THE "MIRACLE" RECEIVING SET An Efficient Instrument For Your Home complete guaranteed in ment for immedlate de ry at $25.00 with a re ing range of from 25 to 50 s. depending upon atmos ?ic conditioijs,' including necessary Copper Anten Lead Wire, Insulators, ound Wire and Double Head Phones. Also tcxtbook ?^ on radio instruc ;^^;;^M*^*f tion and charts. Shipped Parcel Post insured upon receipt of money order or check. Metro Mail Order Company, 347 Fifth Avenue, New York Quality Radio Supplies ? We carry a complete line which will interest both the .novicc and j the experienced radio fan. i Visit our store and see thc | Gotham Vanable Air Condenser /XX)5 mfd?$5.00 .001 mf*--$5,50. BOOKS which help every. radio owner Wireiess in the/ Homef .l-6o Experimental Wireiess Construction .&5c Radio Hook-Ups.75c ABC of Vaeuum Tubes $1,00 DAVID KILLOCH COMPANY Wholetale?Rstail 57 MURRAY ST. Barclay 6518. Long Distance Workers Ship Opp.rator in Chile Hcar* WJZ 4,000 Miles While lying in tho harbor of Iriuiffiie, Chile, on the we%t coast of South America, !hc operator of the steamshio Santa I.uina 'of the Grace Lliie ciearly heard. the entirc concTrt <>f WJZ. Tbe distance separating New? ark station from Ibo steamship in an air line was 4.000 miles. N'ot, only did lhe operntor hcar the entire program, but a large number ot visitors from t.he nitrate works ashore were on the ship at tho time and th?.y crowded into lhe wireiess cabin co listen to thc music. in a statement re? garding ihe incident a representative of the line, after reading the operator's and captain's report-, said: "The visitors, comfortably gituated in the four corner- of the room, lis ?tcned with wonder nnd astonishment Ito tbe various melodiea reproduced by Irthe operator's instruments, which were j heard quite distinctly, even to the exient in some- instanccs of being able to distinguish the different instruments comprising the orchestra. Thc visitois left the stesm-r greatlv irnm-..,. * this latest wonder of rn-X, "^ *''t> the employment of .vhieh ,cl?Ti.>( made posible by th- mj" H'a* Wlly ? *--()uipment of the steamer"'" W*,*1<M iVfanufa-fturer Statr* Patenti Cover Cr^ The- followmjr letter ?..,*? r? : by The Tribune Radio from ,. J1?*** i son, general manager of th " Corporation: Asrcx "Please br advi?eo that th. fn? nt. cover the use ??$*** the la8t two ^ gn-en being circuit P?..?ntv. .' " 933,263, 1,104,066, 1,104,078 i,?'1' 577,461, 904,222, 1.213.260. I.i^jfc. "These patents have beer * '?' to the Radio fJorporation fey th<*f** lese Speclalty Apparatus rom,,,..1"''"" ini? pat-e; tal detector, Bo = ton. Lb*- iatt* '"r company r,,_. the right to manufacf ire Bnd<r "* patenta. [f you so desire ??, ?, . these patents up at the N?rywJj Iic Library, Forty-seconil ..r/. Jr VCTify same. "" '" ?>* "Ir, order that you may flflt . , your reade;., reza-d.ng- patejft.ZT**1 tal detector sets we believe M?*!?fc give some space to the fact tal detector receivinsr or* '? ' Cr'r" ented." Sr* *?? HORNE Radio Products Short Wave Receiving Sets, Tuners, Detectors and Amplifiers m ,,NEPTUNErt HM-1 Riccirtnc T-.nw "SATURN" HM-* Detector-Amp'.ifier Other bright stars on the firmament of HORNE Products are the: "JUPITER"?Combined Tuner and Detector "VENUS"?Two-stage Amplifier. "MARS"?Detector Tube Control Cabinet. The famous HORNE receiving sets are enclosed tn highly pd ished. handsome ebony cabinets. Each unit attached by briehtly nickeled connection bars. Ail battery terminals conccakd. These magnificent receiving sets may also be obtained with cabinets covered in beautiful shades of close-gramed leather dark green. brown, deep blue and glossy black. Distributed by Leading Jobbers HORNE MANUFACTURING COMPANY Qeneral Offices: fludson TerminalBldg* 30 CHURCH STREET New York City Factory Mercer and Colgate Stf JERSEY CITY N.J. ROME RADIO "WIRE Get reliable wire for best resolts. In? sist upon having ROME RADIO WIRE. Uniform, free from Uemitbes. Made, ?ad tested by expert*. Enaatel Covered ?Single Cettoa Covered?Double Cot? ton Covered. U-lz-l-ponnd ipooIjA Arrtexixi?Wire 7-strand or solid bare or rinned copper wire; convenient lengtns for aeriais. &*m COMPANY NEW YORK OFFICE 50 CHURCH STREET RADI FEOTURES Radio Bvoadcast Map FREE With tbe May issue Iil swlal sQDp-.bnient forro. ahotrlni al! broaacasUng stations in r. s RS"? Oraele (Question.. & An<wer?l FUdiophcnlnc irom SHip to Shore Chicago Police adept Radiophme Radio Receiver In Fountaln Pnn Ooean Danelnq to Radio Musie Strnpleet Redioptieno Roeclw Contlnuous Radio Rec?rd?r Radio Roeeptlon en Aircraft What Caused tho Slgnv-s Raelo Conatnictor Hlnts Radio for tho Beainner Rolloloa vla tho Ether Edison a Radio Fon n? ? j. R*.dl0 on Alrwatt Z0 Radio Article* for the Beainner All in the May issue of 5dence?tor/ ?Itwention Now On All News Stands RADIO FANS ? Vloit o,ir \\?| R,|Uir>pi>d- Rndlo Store. I.lsten to Our Supar-Senaltive UeKencrative PHONES $0000 Armstrorig Complrtr |,lne of rtenrn?table Parts Free Espcrt Advice Opi-ri !> a. ni. till ?> p.' jn, Atlantic & Pacific Radio Co., Tei. rlltroj 5895 The Radio Re ceiver with the seven points of superiorittj. SEEITATYOUJt DEALERS F-n^ntiTe Offl^ ?3 1S34 BroadwV New York Ctt j $25.22 cotafffrrw atHtA pjaejiea WITHERBEE RADIO A BATTERY 2-year unconditional guaran? tee. Oqe piece hard rubber case. Safe and clean for home use. Built Right Since 1903. /43/f your dealer or *ec our expert. 877 7th Ave. at 56th St. Fboae t irt-ie ;>I4H ^^nePumte fl?5TSHpWING0F Radio Cabinets \ Seeour , announcement in theRrst News Sedion ofthisnewsjfcijet' TODAY PHnttHom^r&ine. M USE PILOT B BATTERIES dan be, tappeii at any vollage from " lo T'JH volts. , Write NCAv for our preposition. PILOT ELECTRIC MFG. CO. i?ept. 1>. 115 SoutU Fifth Street, Brooklvn, N. Y. RADIO EVVBV riONs and- oOmf tiumi* r?4?nt At rorm-.vs A KiiK'.ne#r*. t'atl er wrttu. KKEE ADVICE.