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MUSIC FEATURES IN WCAP PROGRAM Station Tonight Will Radio Special Recital and an Address. Four musical features and an address compose the program tonight of WCAP. The station will go on the air at 7:30 o'clock and broadcast until about 10:30. A concert by the W. J. Oates Student Orchestra, assisted by Julius Ochs, violinist, and Carl Ochs, pianist, will open the program. A speech by Herbert E. Morgan of the United States Civil Service Commission on “A Billion Dollars a Year to Feed Bugs” will follow. Ix>uis B. Thompson, tenor, whose voice is well known to Washington radio fans, will give a recital from 8:30 to 9, followed by a concert by the Columbia Trio, composed of Kathryn Crowley. pianist; Rena Greenberg, violinist, and Miriam Barking, cellist. One of the outstanding features, a program by the Imperial Male Quartet, will be broadcast from 9:30 to 10 o’clock. The quartet is composed of W. Arthur McCoy, first tenor; George E. Anderson, second tenor; J. Benton Webb, baritone, and Francis P. Hart sill, basso. WRC Afternoon Program. WCAP will close its program with a continuation of the concert by the Columbia Trio, scheduled to begin at in o’clock. WRC’s afternoon program includes among its features tea music by the Meyer Davis Tt-io, direct from the palm room of the Willard Hotel; a song recital by Mrs. S. Peter Wagner, dramatic soprano, and a book review, under the auspices of the League of American Pen Women. "In the Path of the Trade Winds” is the book to be reviewed. The author, Cora M alls Thorte, will be the reviewer. Local Radio Entertainment Monday, January 5, 1925. N\ \ Naval Radio Station. Radio. Nil. ( tar. Meters). 3:45 p.m.—Weater Bureau reports. 10:1)5 p.m.—Weather Bureau reports. WRC—Radio Corporation of America (4(>i» Meters). 1 p.m.—Book review under the aus pices of the League of American Pen Women; "In the Path of the Trade Winds.” by Cora Malls Thorte, re viewed by the author. 4:20 p.m.—Song recital by Mrs. S. Peter Wagner, dramatic soprano; Mary ALmoney at the piano. 4:30 p.m.—Tea music by the New M'illard Hotel Meyer E»avis Trio, broadcast from the palmroom of the New M'illard Hotel. 6 p.m.—Children's hour, by Peggy Albion. WCAP—Chesapeake and Potomac Telephone Co. (401) Meters). 7:30 to 8:15 p.m.—Musio by W. J. Oates Orchestra, assisted by Julius Ochs, violinist, and Karl Ochs, pianist. 8:15 to 8:30 p.m.'—“A Billion Dollars a Year to Feed Bugs” will be the sub ject of a second talk by Herbert E. Morgan of the United States Civil Service Commission. 8:30 to 9 p.m.—Louis B. Thompson, tenor, in a group of songs. 9 to 9:30 p.m.—Concert by the Co lumbia Trio—Kathrj’n Crowley, pi ano: Rena Greenberg, violin, and Miriam Larking, cello. 9:30 to 10 p.m.—The Imperial Male Quartet, in a group of songs—W. Arthur McCoy, first tenor; George E. Anderson, second tenor: J. Benton Webb, baritone; Francis P. Heartsill, basso. 10 p.m.— Continuation of the Colum bia Trio concert. SOS CUTS IN ON ROXIE. Concert Last Night Interrupted by Distress Call. The major portion of the concert last night by and ‘ his gang” at the Capitol Theater, was denied Washington’s radio audience due to a SOS call flashed through the ether by the American tank steamer, Wil liam Rockefeller, which went ashore at Matanzas Point, near St. Augustine, Fla. Scheduled to start at 7:20 o'clock, the "Koxie” program did not go out until more than an hour later. In the meantime, radio fans tlie Chesapeake and Potomac Tele phone Company and newspaper offices to learn the cause of the delay. RADIO QUERIES Radio Editor: I would appreciate your effort to locate the call letters of a station in New Brunswick, Canada. I had the. station on my set, but missed the call letters when it signed off at Jl:40 o'clock, intercolonial time, Friday night. The station’s wave length was about 325 meters. I thought the an nouncer said station CNRA. Several orchestra numbers preceded the sign ing off.—J. L. SCHAFFERT. CNRA are the correct call litters of the New Brunswick station. It is located at Moncton. Radio Editor: Answering J. R. W.'s query, the selection lie heard Thursday morning at 1:05 o'clock was broadcast from station M'KBH, the Edgewater Beach Hotel. Chicago. 1 tuned in this sta tion just, before 1 o’clock to be in at the birth of a new year, central time,* and “The Little Grey Home in the, West” was i lie first selection rendered after 1925 had been welcomed. At midnight. Eastern standard time, 1 heard the Trinity chimes through M'RC, and at 2 a.m. received New Year greetings from K()A, Denver, Colo, (midnight mountain time), thus participating by radio in three, differ ent New 1 ear celebrations. I wonder if any of your readers got the coasti at 3 a~m.'.’--J. A. R. RADIO’S BEST OFFERINGS TONIGHT. Musical program by Im perial Male Quartet, WCAP, Washington, 9:30 to 10 o'clock. Special musical program from Mark Strand Theater, WEAF, New York, 7:15 to 8:30 o’clock. Hockey game from Boston Arena. Boston-Bruins, vs. St. Patricks, WBZ, Springfield, 8:30 o’clock. Musical program from Bran ford Theater, WOR, Newark, 8:30 to 9:30 o’clock. The annual Pi Eta show,, WNAC, Boston, 9 to 11:30 o’clock. One-act corned y, “The Rough Diamond,” WOC, Dav enport, 11 o’clock. Long Range Radio Entertainment ] MONDAY, JANUARY 5, 1925. The Programs of the Follotcing Distant Stations Are Scheduled for Eastern Standard Time —: ' i 3 TO 4 P.M. Meters. Miles. 3: °°—ReHta l b;/ tho SkiMnsky Violin Studio ... WIP Philadelphia 50» 123 In.ks; ( iiniptire fiirls program: mimic; talks WORS New York 3'U» °f>4 Woman's program: “Mv Job”: Rotary Club W(TO Minneapolis 417 987 Musical program by Detroit News Orchestra WWJ lb*troit 517 397 Reading of Scriptures from studio KPO San Francisco 423 2.442 Markets, vocal and instrumental program WFI Philadelphia 395 123 “Interviewing <V|p|Vritle«‘.” l>y Jane Dixon 1 IVOR Newark 40."> llto 3:ls—Vocal pro-ruin by Mildrcii Trnniiin. soprano WOlt Newark 405 195 3:3o—Mrs. Charles K. Dull, dramatic rcHder WOlt Newark 405 195 Musical pryeram. vocifi and ins'.Tumcntal WCCO Minneapolis 417 937 C 3:4s—Piano recital by C.eorpctte Itredeulteck WOlt Newark 405 195 i Evelyn Stockton, songs: Sid Wolff, pianist WHN New York 3«o 204 3:so—Weather forecast and market reports WWJ Detroit T>l7* 397 1 4 TO 5 P.M. 4:oo—Rudy Seiger's Fairmont Hotel Orchestra KPO San Francisco 42.3 2.442 ! Musical program by (Mploy Plazu Hotel Trio WNAO Boston 278 390 1 4:os—Ktliel Penlieim. child pianist WHN New York 860 204 * 4:ls—Fain and (Voss, harmony singers WHN New York 300 204 I Musical program by Detroit Symphony Trio WCX Detroit 517 397 . 4:2s—Leretto C. Lynch, in "Tea Time Talks” WHN New York 300 204 4:3o—Musical program by Star's Radio Trio WDAF Kansas City 411 842 . Artist recital: vocal and instrumental solos WD.VR Philadelphia 395 123 * Bert Dixon, baritone: Elmer Ituss. pianist AVJZ New York 455 204 4:3si—Olga Itosi, lyric soprano ..., ' WHN New York 300 204 . 4:4o—Police reports; grand organ and trumpets WOO Philadelphia 509 123 4:45 Pncle Robert's chat to children WHN New York 3110 204 ' Home-makers’ hour; stories: talks: music WI.S Chicago 345 594 £ Joseph Kneeht’s Waldorf-Astoria Orchestra \YJ/. New’ York 455 204 t 5 TO 6 P.M. » t s:oo—Mothers in council, by Mrs. Frances M. Ford W.MAQ Chicago 448 504 f Orchestra program; news; weather; readings WHAS Lniisville 400 471 t Babson reports WTAV Cincinnati 423 403 . Educational program from Pierce School WDAR Philadelphia 395 123 Magazine hour; “Prelude.” by Kdgnr Smith WCCO Minneapolis 417 937 Charles Taylor and his Sout’herner*’ Orchestra WHN New York 300 204 t 5:30 —Farm and home reports; news bulletins W.T7, New York 455 204 t Talks on English by Mrs. Elliott Jenkins WMAQ Chicago 448 594 , 6 TO 7 P.M. " 6:oo—Children’s stories by Pncle Geetiee ...WtIRS New York 330 204 . Rov Scout program by Kansas City Council WDAF Kansas City 411 942 Jean Goldkette’s Concert Orchestra WCX Detroit 517 397 f Children’s program; music and stories WNAO Boston 278 390 t Weather; Hotel St. James Orchestra program Wll’ Philadelphia 509 123 < Westinghouse Philharmonic Trio WBZ Springfield 337 321 Dinner music by Waldorf-Astoria Hotel Orchestra... WEAF New York 492 204 * Produce and s:ock market quotations: news; reports WGY Schenectady 380 . 313 < 6:ls—Dinner music by Drive Harman’s Orchestra :. WOR Newark 405 195 , Dinner concert Py KUKA Kittle Symphony Orchestra KDKA Pittsburgh 326 188 . 6:3o—Sport talk hv Harold A. Bruce WGY Schenectady 380 313 Dinner music from Hotel Westminster Winter Garden , WNAO Boston 278 390 1 Children's hour, by Mrs. R. G. Cargill WCCO Minneapolis . 417 937 Dinner music by Hotel Carlton Terrace Orchestra... WHN New York 360 204 . Meyer Davis’ Belle vuc-St rat ford Hotel Orchestra . . WFI Philadelphia 395 123 Dinner music by Ted Brown’s Colored Entertainers. WGBS New York 330 204 < 6:4s—Agriculture, live stock and produce market reports. WIP Philadelphia 509 123 t 6:so—Weather forecast; market and road reports WDAF Kansas City 411 942 < 7 TO 8 P.M ( 7:oo—Musical program: stories: addresses; talks WDAF Kansas Citv 411 94- « Pncle Wip’s bedtime stories: roll call; dancing * , lessons for kiddies by Miller Conservatory of , Music ............. ... WTP Philadelphia 609 i*mj . Sunny Jim. the kiddies’ pal; stones; music .WFI Philadelphia 395 log 1 Sporting talk WCCO Minneapolis 417 937 > Myra Bindenberger, enntralto: Kathleen Stewart... WEAF New York 49’» oivi « Chicago Theater organ recital u WMAQ Chicago 44s nul , Bernhard Levitow's Hotel Commodore Orchestra... W.IZ New York 455 ~,J Dinner concert hour by Cincinnati Post WLW Cincinnati 403 777 Final market reports: farm news bulletins WT,g Chicago 3T5 rtu Market reports: children’s stories; readings WBZ Springfield 337 s”i Detroit News Orchestra: vocal program WWJ Detroit 517 30- Organ music by Arthur Hays WOAW Omaha 5”« * 1 010 * News, financial and final market reports: talks.... KYW Chicago 53(5 rul Dinner concert from Isiew's State Theater WJAX Cleveland 390 303 1 Dinner music by Harry Ash’s Royal Orchestra TVNYC New York 5>6 7:lo—Fashion chats by Mine. Belle WHN New York 3*9) 4 7:ls—Musical program from Mark Strand Theater WEAF New York 49” ->O4 ; Stockman, live stock and produce market reports.. KDKA Pittsburgh 3215 Tc, 7:2s—Hotel Carlton Terrace Orchestra program WHN New York 3«0 ”(u 7:3o—“Spring Styles": Hotel Carlton Orchestra 1 WHN New York 360 ~*iu Children’s period KDKA Pittsburgh ,V'« t*B Police reports; health talk: Harry Ash's Orchestra. WNYO New York s”rt ”04 Rudy Seiger's Fairmont Hotel Orchestra KPO San Francisco 4”3 0 44'' Dinner music I.y Hotel Adelpliia Orchestra WOO Philadelphia 509 " Too Arcadia Concert Orchestra program WI»AR Philadelphia 395 ,33 Violin rec tal by Milan Dusk WMAQ Chicago 448 594 7:3s—Concert from Copley Plaza Hotel WNAC Boston 278 ' sat) Children’s program: stories by Pncle Bob KYW Chicago 53ft 594 . Dream Daddy, with hoys and girls WDAR Philadelphia 395 103 7:4s—“Short Agro-Waves." by Charles P Sheffner WDAR Philadelphia 395 ' 103 Sporting news and weather forecast WOC Davenport 484 737 Musical program, vocal and instrumental: talks ...WGY' Schenectady 380 313 1 8 TO 9 P.M. B:oo—Concert by Arcadia Orchestra WDAR Philadelphia 395 1”3 Talk. “Russian Music.” by Aaron Richmond; quartet WNAO Boston 278 390 Sandman's visit: stories by Val McLaughlin WOC Davenport 484 V 37 Girl Scout meet-inir KDKA Pittsburgh 326 188 Battery talk: Roseiand Dance Orchestra WHN New Turk 3Ho "(m Concert by Aleppo Drum Corps WBZ Springfield .337 3”i 1 Wall street news: N. Y. P. Air College talk WJZ New York 455 '204 Stocks; final markets; news bulletins KOA Denver, Colo. 323 1 489 Musical program from Missouri Theater KSD St, ’ -46 '-'id 1 Vocal and instrumental program WAHO New York 316 204 Watchtower String Quartet: solos: news WBBR Kossv’e, N.Y. 273 7h5 ! Children's program: story by Aunt’ Nell KGW Portl’d. Oreg. 402 ’“357 “Half Hours with the Violin Masters” WOK Newark 405 ” 195 B:ls—Talks on American foreign policies KDKA Pittsburgh 326 198 Talk on the State Nautical School WNYO New York 526 204 B:3o—Adele Ctoekrane. mellophone novelty WNYC New York 526 204 Concert by KDKA Kittle Symphony Orchestra: Travelogue on “Hawaii” KDKA Pittsburgh 326 188 Musical program from Rranford Theater WOR Newark 405 195 Musical program by Black and Gold Serenadcrs WBAP Fort Worth 47H 1,211 “I>>arn a Word a Day” WJZ New York 455 204 , Musical program by Highland Park Musical Club... WCX Detroit 517 397 Hockey game from Boston Arena: Boston Bruins vs. St. Patricks WBZ Springfield 337 321 Richard MeClanahan. piano selections WEAF New York 492 204 “Superfluous Hair.” by H. W Carlougii WHN New York 360 094 Children’s hour; stories by Big Brother KPO San Frapeisco 423 2 442 Special program from Hebei Adelphia; banquet WOO Philadelphia 609 "" 123 1 Artist recital from studio WDAR Philadelphia 395 123 8:40 —Boh McAllister, tenor ...WHN New York 360 204 Leslie Joy. bar tone; Kathleen Stewart, pianist ....'WEAF New York 492 204 B:4s—Claire Dnx. soprano WJz New York 455 204 Reiserfeld program from Rialto Theater WNYO New York 526 204 B:so—Richard MeClanahan. piano selections WEAF New York 492 204 1 Musical program by Littmann’s Employes’ Orchestra WHN New Ycrfk 3 qo 3^ 9 TO 10 P.M. 9:oo—“Around the Town With WDAF” WDAF Kansas Citv 411 «,.> Piano recital by Harry M. Snodgrass. “King of ’ the Ivories” WOS Jefferson Citv 441 sta Musical program by A. and P. Gypsies WEAF New York 49*> ' onj Junior Choir: vocal solos: organ recital WORD Zion 111 *7,1 1 ’Fimes-Star program; orchestra; vocal solos WLW Cincinnati i’’3 L’.U Annual Pi Teta show W'NAO Roston 070 ~7, "Current Events.” by W. P. Lemon WCCO Minneapolis 4)7 0,. Vocal and instrumental program VTA HG New York 316 ooi 9:ls—Vocal and instrumental program: readings WEMC Ber. Sp Mch •>«a f'* 9:2o—Movie review by .Tames A. Nassau WDAR Philadelphia" «95 ,'<>o Ben Lyon, movie star, interview by Nanette Kutner WHN New York 360 J *'l 9:30 —Radio cross-word puzzle: Dan Gregory’s Orchestra.. WHN New York 9,in 7,77 Magnolia Petroleum Co.’s Dallas Band WFAA Dallas 47a ,777 “The Origin of Language and Some Sources of n 1.183 English” WOR Newark 465 ' Features from Stanley Theater: orchestra WDAR Philadelphia 395 JJS Fort Snelling 3d Infantry Band: travelogue. “Ha- ” ■-J wnii” ••,••• ••• WCCO Minneapolis 417 037 “Down on the Farm program: instrumental se lections KTHS Hot Sps , Ark 375 on -9:4s—Music5 —Music reviews by Dr. Sigmund Spaeth IVOR Newark 465 io- ' Elite Orchestra program WNYC New York s°« 10 TO 11 P.M. ' ■ 10:00—Voea! and instrumental program; reading WOC Davenport 4.84 Weather forecast WOO Philadelphia 509 i'..i < Rudy Seiger's Fairmont Hotel Orehestra KPO San Francisco 4‘>3 oil?, Musical progra r from Grand Central Theater KSD St. I>ouis 546 * -,7 Orchestra: arir.rcss: reading: male quartet KOA Denver Colo 303 1 100 Arcadia Dance Orchestra: vaudeville features WDAR Philadelphia 395 Jack Shack program WHN New York 360 '.oj Vocal and instrumental program WAHG New York 3t« 50. I-eslie Joy. baritone WEAF New York 49“ ivy! 10:15 Midnight Sonß' Dance Orchestra WEAF New York 490 r' , “The Trend of the Times.’' by Dr. Esher WNYC New York 509 "7; Musical program by Piedmont Trio W.IZ New York 455 004 10:30—Police reports: weather: Elite Orchestra WNYC New York -,V fi 7, ’ J Musical program: Montgomery-Ward's Entertainers. WNYC New York '509 7,71 Dance program Irv Vincent Rizzo and his orchestra. WOO Philadelphia 609 103 Ascuitto Brothers’ Dance Orchestra WAHG New York 316 ~77 10.45—Jacques Green and liis orehestxa: Clark's HawaiianssVJZ New York 455 7,,7 Concert by the Carolinians' Dance Orchestra WOR Newark 405 in’- ll P.M. TO 12 MIDNIGHT. 11:00—One-act comedy. “The Rough Diamond” WOO Davenport 484 7,37 Organ recital by Theodore Irwin KPO San Francisco 42.3 0 440 Dock Howard's Cuvier Entertainers WBAT Cincinnati 309 * 463 Dick Ling's Nankin Case Orchestra WCCO Minneapolis 417 037 "Concert by the Oregonian Orchestra KGW Tortl'd, Oreg. 492 2 357 11:30—Artists from “Dixie to Broadway”: colored mu sical revue program from Majestic Theater: Voderey's Plantation Orchestra WNAO Boston 278 306 “Chicago Serenade” dance program ..KTHS Hot Sps.. Ark. 375 905 MeEnelly’s Singing Orchestra WBZ Springfield 337 3*>j I’. rry and Russell, two-man singing orchestra WOR Newark 405 195 12 MIDNIGHT TO 1 A.M. 12:00 —Original Harlequins' Danre Orchestra WAHG New York 316 264 Talk on “Better Lighting.” by H. C. Barnard KPO San Francisco 423 2 442 12 45—“ Nighthawk frolic": Plantation Players WDAF Kansas City 411 942 1 TO 2 A.M. I:oo—Max Rradfield's Versatile Band KPO Ran Francisco 423 2,442 Dance music by George Olsen's Metropolitan Or chestra KGW Portl'd, Oreg. 492 2.357 Radio Editor: Os late many letters have appeared in yourt column regarding interfer ence —harmonics. “squeals," spark sets. etc. —but T think the noise which is heard in the Sets about -Eighteenth street and Columbia road has them all beat. Whereas harmonics, • squeals" and interference from spark sets are more or 10-ss Confined to;one 'band of wave length, this particular qrjj is audible on 1 : all 'wave" lengths, but is more pronounced-on the short er ones. It is a loud frying noise, like a long dash of a spark set, al though ft could not very well be one, as in all the 18 months; I have heard it. the noise has been a steady frying sound, never the familiar “dit-da" of the code. During the Summer and early Fall it did not break out very often, but within the past month or so it has become more and more frequent until at present at least four nights a week it roars in. New Year eve was a typical night. When the writer tu».ed in about 11:30 o’clock the nois? was going, and from that time until 4:30 the next morning it was interfering with the reception of DX. It is not continual, but will run for several minutes, then stop for about the same length of time. At times the noise will be very loud, then again it won’t be so bad. I have endured it for a year and a half, always hoping that a more selective set would eliminate it, but, one by one, the single circuit, reflex, three-circuit and many of the “freak" hook-ups have all been tried until now I have a Neutrodvne, the acme of selectivity, but still the noise roars in. I certainly would like to hear from similar "sufferers” in my neighborhood—possibly we c&a-aJJ. get together *uid. -secure the THE EVENING STAR, WASHINGTON, D. C„ MONDAY, JANUARY 5. 1925. belp of the radio inspector or have the Bureau of Standards put a direc tion finder on the job. Please pardon mie for using so much of your valuable space, but I have suffered long and had many a DX’concert ruined by this nuisance. MIDBURN PETTY, 1830 Calvert St. Radio Editor: What is the airline distance from •Washington to the following sta tions?: WJAR, Providence; KFKB, Milford, Kans.; IV'MAK, Lockport, N. Y.; IVCAD, Canton, N. Y.; WOI, Ames, Iowa; WJJD, Mooseheart, 111.; WRAV, Yellow Springs, Ohio; WEAO, Colum bus, Ohio; IVEAM, North Plainfield, N. J.; W'PD, Atlantip City; WCAL, Northfield, Minn., and KOA, Denver, Colo.? I think your column is the best and most helpful in the newspaper. —J. S. WILSON. The airline distances from Wash, ington to the cities you mention fol low" Providence, 355 miles; Milford, 1,066 miles; Lockport, 307 miles; Can ton, 403 miles: Ames, 898 miles; Mooseheart, 605 miles; Yellow Springs. Ohio, 372 miles: Columbus, Ohio, 327 miles; North Plainfield, 182 miles; Atlantic . City, 142 miles; Northfield, 917 miles; Denver, 1,489 miles. Announcer Gets Wish. A few weeks ago a broadcasting announcer in Jefferson City, Mo., hap pened to murmur into his microphone his yearning to taste again some old fashioned cane sirup. A listener in Columbia, Da., heard, him, and the next day a can of the delectable liquid arrived in Jefferson City by express. VALUABLE METALS NOW USED IN RADIO 1 Engineers See Real Worth in Platinum, Silver I and Gold. ; Gold-plated bus-wire, sterling- silver ’ contact points and solid platinum cat- ] whiskers are among- the latest radio ( novelties. To many radio constructors ] these things seem merely extrava- , gances,! Other engineers contend that real and important benefits are ob tained from the use of these precious metals. There is talk of the greater ; electrical conductivity of silver and j of the improved electron emission ! from platinum. The truth of the matter is that these 1 three metals—gold, platinum and all- 1 ver—derive whatever value they pos- : sess for radio use entirely from the ; ways in which they are affected by the air. It is the surface corrosion film that forms (or does not form) on ’ them that makes them of interest to ! the radio constructor; When copper wire—as, for example, the wire wound on a coil—is exposed to the air there forms slowly on its surface a very thin surface layer of copper sulphide. This layer will form 1 even underneath the wrappings of a silk-covered wire, for the silk threads : are iiermeable to the air, and the gases that produce the copper sul phide get through them. So far as concerns the direct-current resistance of the copper wire this does not mat ter. The decrease in effective diame ter of the wire due to the sulphide film is altogether negligible. But for radio-frequency currents this may not he true. Such currents 1 travel mainly near the surface of the conductor. This is what is called the “skin effect.” Accordingly a poorly conducting layer of copper sulphide on the surface of a wire may alter considerably the resistance of the wire for radio-frequency currents. It Is not possible to say that it does alter the resistance, for no one has ever worked out the matter experi mentally. Silver I» Good (Vndartor. Now, when silver wire Is exposed to the air it forms a coating of silver sulphide in very much the same way as copper does. But this silver coat ing. unlike the copper coating, is a good conductor of electricity—almost as good as is the metallic silver itseif. •Accordingly, a silver-wire coil may be better for radio than a copper coil is. Again, we cannot say that it is better. Precise experiments have never been made. Now for the catwhiskers. We are informed by several experimenters, notably by l)r. John B. Buehler of Los Angeles, that actual experiments show a substantial advantage In the use of a cat whisker made of gold or platinum wire over one made of cop per or brass or bronze wire. This, too, may be an effect of surface illms. Gold alters iri air only very slightly: platinum scarcely at all. Nobody knows the theory of how the crystal detector works, but we do know that very thin, invisible films of dirt or oil or of many other things will affect the operation of the crystal very seriously. Perhaps the same is true of the film of copper sulphide that forms over the point of a catwhisker made of copper or of copper alloys. Perhaps gold, lacking this film, pro vides a better contact or a contact more suitable in some manner for the rectifying action upon which the operation of the crystal depends. No field in radio cries so loudly for precise investigation as does this one of the effect of air-formed surface films on the behavior of radio appa ratus. Sareful and patient studies of the effects of known surface films on known metals used as wires or cat whiskers would undoubtedly be valu- » able both theoretically and practi cally. (Copyright, 1925, Popular Radio, Inc.) HIGHEST RADIO STATION. Outfit 9.439 Feet Above Sea Level in Pyrenees. BAYONNE, Prance, January 5. The highest radio station in the world has been opened on the Plc-du-Midi, in the Upper I'yrenees, near the Spanish border. It is 9,439 feet above the level of the sea. It is expected to make possible the obsevation of a number of radio telephonic pheno mena which thus far have remained unexplained. RADIO SERVICE Is Your RADIO Out of Order? Phone Main 6829 9 a.m. to 5 p.m. and 7 p.m. to 9 p.m. J&gjP /Gm NBREAKABIE AH! TASTELESS EPSOM SALTS 0 World’s finest Physic now Pleasant as Lemonade o O o • I fri ■'innmTiTTT& Pure Epsom Salts has i=ai ; no equal in medicine : :b, ‘ : for constipation, bil ! I fJa I iousness, sick headache. 11 « mUI | Doctors and nurses de ;[d.| pend upon it because no i‘! hK other laxative acts so | i | 1 perfectly, so harmlessly I i 1i on the bowels. It never I'■ § > ili e | gripes or overacts. Salts” is PiiiTTrnrrmLia p ure }7p gom s a it s made pleasant with fruit derivative salts— nothing else. It tastes like sparkling ; lemonade and costs only few cents a package at any drugstore. Try it! “Epsonade Balts” is guaranteed by the American Epsom Association. FIFTEEN MINUTES OF RADIO EACH DAY BY JOSEPH CALCATERRA, Noted Authority on Radio. All Rights Reserved. Reproduction Prohibited. All menu reserved, ni lion to lluild a Power Amplifier Unit, i I'nrt 1. If a set has been constructed properly, two stages of audio fre quency amplification will usually give a man all the volume that is necessary to entertain a houseful of people. There are times, however, when much greater volume is desired in order to provide entertainment for a large audience or for such gala oc casions as parties, fairs, street or lawn parties and other open spaces where very great volume is desired. In such cases the average fan usually thinks of another stage of amplification, added to his second stage in much the same way that the second stage is added to the first. Ordinarily his line of reasoning is that if one stage of audio frequency amplification added to a one-stage amplifier will increase the volume, another stage added to the second will increase the volume still more. This, of course, is true as far as volume is concerned, hut unless trans formers of a low ratio and good de sign are used and the circuit is care fully wired, the result will be greater noise instead of greater volume. For most people it is not advisable to use three stages of audio fre quency one after another in what is known as cascade audio frequency amplification. The results obtained from such units arc seldom satisfactory because the quality of the sounds issuing from the loud-speaker is anything but pleasant or understandable. Where considerable volume is present it is particularly important to make sure that the received pro grams are not distorted, for such dis tortion is augmented by the amplifica tion used. The “push-pull” system of audio frequency amplification is one of the most important developments in the field of amplification of received sig nals. In this type of circuit, the faults of the straight audio frequency am plifier circuit are done away with to a remarkable extent. Two tubes are used, conneoted to gether, fco that when the grid of one and Soothing Syrups, espe cially prepared for Infants in arms and Children all ages. To avoid imitations, always look for the signature of Proven directions on each package. Physicians everywhere recommend it, Seaboard Florida Limited Leaves Washington 12.10 A.M. INAUGURATION OF THE (Sleepers open 9.30 P.M.) Effec tive Jan. 23rd, section compart- T*'+ fI if 1 FW s « * Sit:To e First through Irani service through Central Florida. . Orange Blossom Special to East Coast of Florida Leaves Washington,9.2o A.M. - (Open 10P.M.)EffectiveJan.26th, roi*Kr»n* through sleeping cars to Winter WimOllL mterCnange Haven, West Lake Wales, Seb througiTcentrai^FloridaPob«!r- On January 24,1925, the Seaboard Air Line Railway (over its vation cars. own ra ils South of Richmond) without interchange, opens The Floridian new ’Cross-Florida short line from Northern and Western a fi V ne S , ffst S m.n°w,th'no stem cities to West Palm Beach (Palm Beach); and on January . n om?iifal a rR n orlda S '^st J » C nd 27th establishes Coast to Coast day and night service be «"Lm«nTaSn?tonTndsn tween St. Petersburg, Tampa, Sarasota—West Palm Beach Petersburg through Tampa. and intermediate points, shortening the time by many Coast to Coast Limited hours across Florida, from Coast to Coast. Through sleep cS V a C nd J Tiee2ng ing, dining, and observation cars. Optional and diverse BeX route fares, including Florida’s East and West Coast resorts. through intermediate resorts. ’Cross-Florida Limited * Effective Jan. 28th. Day service— coaches and parlor cars —between . St. Petersburg, Tampa—West Palm Beach through intermediate M W ■ fl H resorts. Connections to and from B B & 9 B B -r w L lvCiLfv/U.lvl For illustrated literature, inf or nation and reservations apply to A ‘V Air Line Railway 714 14th Street, N. W„ Waihinston . kr Telephone Main 637 leproauciion jrromDiiea. Is made positive by an Incoming - sig nal, the grid of the other is made negative. The distortion which would be found in an amplifier system of the cascade type with the two tubes con nected one after another is elim inated because the grids of the tube operated 180 degrees out of phase with each other so that the elements of distortion in one tube balance out the elements which cause distortion in the other tube. Another factor in this elimination of distortion is due to the fact that the voltage variations impressed on each tube are only one-half those which would be Impressed on a sin gle tube in that position, so that the tendency to overload the tubes, causing the tube to operate over a larger portion of its characteristic Curve, is done away with. Two tubes connected in this way do not give as great volume as two stages of cascade amplification, but such an arrangement can be added to a receiver containing two stages of amplification without distorting the signals, while two stages of straight cascade amplification could not be added to a two-stage receiver with out causing considerable distortion. SHAKESPEARE ON AIR. WLS to Begin Series With. “Romeo and Juliet” Tuesday Night. CHICAGO, January s.—'‘Romeo and Joliet’* will be broadcast Tuesday night by WLS as the first of the series of Shakespearean plays ached- i uled during January. "Taming of the Shrew," is scheduled January 13; "Merry Wives of Windsor,” January 20, and "Much Ado About Nothing," January 27. "Juvenile Adventures,” also will be a new feature of WLS's Tuesday night programs. They consist of radio versions of Robert I.ouis Stevenson’s "Treasure Island," written by Hazel Straight Stafford. "Juvenile Ad ventures” will be a serial story, and the first Installment will be broad cast Tuesday night. RADIO AMATEURS DENIED USE OF SHORTER WAVES 105 and 110 Meter Bans Given to | Use of Federal and Com mercial Stations. Amateur radio operators must cease using: the wave length band between 105 and HO meters, under revised regulations governing ama teur radio station operations, just issued by the Commerce Department. This section of the ether is being taken up by commercial and Gov ernment stations. Amateurs who operate with a spark set, which the department classes as a source of much interference, are instructed to use only the wave length band between 170 and 180 mete.rs until such time as they have installed a transmission system pro ductive of less trouble to other radio communication. When a B battery drops below 17 volts it should be discarded. a«lUlilUlllll!lllfj ANSELL, BISHOP & TURNER, INC. lllWllllilffliffl The Place to Buy— RADIO (All Standard Makes) VICTROLAS (From $25 to $375 — All Wood Finishes) MUSICAL INSTRUMENTS (Everything From Harmonicas to Orchestra and Band Outfits) VICTOR RECORDS (The Largest Stock in Washington) PIANOS ( Players — Grands — Uprights) —PIANOS FOR RENT— Many features enter into the purchase of any of these items from ANSELL, BISHOP & TL T RNER— First, an assurance of quality and unexcelled SERV lCE—second, a GUARANTEE that the purchase MUST BE SATISFACTORY —and third —A MOST REASONABLE DEFERRED PAYMENT PLAN may be arranged! “The F Street Music Shop" ANSEII&SH^rURNER^ 1 1 1221 FSt.NW aiEMiaiiim NEW BROADCAST STATION HAS PALATIAL STUDIO j William Wrigley and Former Mayor Thompson Backers of Chicago Enterprise. By the Associated Press. CHICAGO, January 5.—A new radio broadcasting station, with a palatial studio to provide visible as well as audible entertainment, was an nounced for Chicago. Its sponsors are William Wrigley, jr. t and William Hale Thompson, former mayor, the station having been given the latter's initials, WHT, as its designation. WHT will be opened in a patriotic manner on Washington's Birthday an niversary. A further patriotic touch was given the station when it was assigned a telephone with the num ber State 1776. Clearer signals are obtained with the detector tube adjusted below the maximum signals strength.