Evening Star Newspaper, September 19, 1926, Page 36

; THE SUNDAY STAR, WASHINGTON, D. C. SEPTEMBER 19. 1926-PART 1 ¥ bheen found for radio. there are many | : SUNDAY. SEPTEMBER 19, 1926 TONIGHT. e G B B LR Gl i it Trograms of Distant Stations Schedulrd ior Eastern Standard Time Musical program by Ma these practical benefactors admit that | Safety rules for radio installationg General Electric Stations Will Despite Progress, Science St Geo s Episcopal Church services Edward Bowes and the “Cap! there still remains considerable mys. | have just been issued by tha Rurean . John Corigliano Will Play e T Baptist, Chureh services Have Systematic Winter Has Not Yet Found Answer tol Family,” direct from Capi- tery in the radio science. To the lay tol Theater, New York City, man probably the most remarkable | MG At Seel TSERG K a nde all, bringing him entertainment and | P00k _supplementing the National 200-Year-0ld Instrument. |, At S ] Capitol Family Reunited. Experiments. to Many Questions. 8 TO 9 AM. stories_and music tholic Church servi 5 TO 10 AM. Methodist _Episcopal Church sersices. . Sunday_school. by Methodist Book Coocern York oseheart Children's co Til.: Roman 9:20—Philadeiphia 2730 Cine as well, since it requires a very long | Were formulated and approved by a time to master this remarkable means Sectional committee organized accord. of communicating through space. |ing to the rules of procedure of the American engineering standards com- mittees. WRC, WEAF and other sta- thing about radio Is that it works at | °f instruction out of the air, practically ;1'”“'“'"'"1 Safety Code. | 55— Boston 10 TO 11 Al tions, 6:20 to 8:15 o'clock. “ free of cost. He does not understand | The work provides rules for the in- Play, “Ingomar, the Bar- it, and, unless he is the type which |Stallation of transmitting stations, First Church of Chriat. Scier Paul's Cathedral services barian,” WGBS, 8:30 to 9:30 dévelops into an amateur, he never | €lectrical supply stations, etc., and the o'clock. attempts to. Which, perhaps, is just | construction of antennas. Thess rules Christian Science services Weather and river reports Paul Christianson's Hotel Fort Des Moines Orchestra, WHO, 8:30 to 9:30 o'clock. s Atwdter Kent. program, fea- turing John Corigliano, violin- ist, and Allen McQuhae, tenor, with orchestra, WRC, WEAF and other stations, 8:15 to 8:45 o’clock. All-American Pioneers, WENR, 9:30 to 12 o'clock. FIRST SUPERHETERODYNE STILL IN USE HERE Set Built by Maj. Armstrong Eight Years Ago Is in Historical Collection. The first superheterodyne radio re- ceiver, built by Maj. E. H. Armstrong of the United States Signal Corps in a laboratory in Paris in 1918, is still 10:00- — | King of Siam Dims Lights. BANGKOK, Siam, August 15 (Cor- | respondence). ight life in Sfam was a bright affair under the reign of the late King Rama, according to the government audit of the royal deficit of $3,750,000. About $500 a day was spent for electric light in the royal establishment. Annual expenditur ran to $4,500,000 a vear. King Pracha tipok hopes to cut his expenditures to | $2.500,000 for the present year. S Edward Cook, financial advisor, drily reports that “some saving of expendi | ture' is expected in the electric ligl 104 nati New York: Calvary Baptist Church service 10 Chicaga: Seventh Church of Christ ntis BY CARL H. BUTMAN. Probably the most fascinating thing about radio, aside from its apparently unlimited scope and great adaptation. is its inherent mystery, which still clings to it despite the great advances made in this new science and art. There may be some fans: who are so credulous as to believe that we know all about radio. They are far from correct, however, as even the exper will point out. We are just learning how to keep a broadcasting station on its assigned channel, after nearly five years of broadcasting. Apparatus for both transmitting and reception 8. of course, operative and service- able, but there are many improve- ments still to be made and much re- search to be done before radio will be perfectly adaptable to our require- ments and understood in all its vagaries. Although we have mastered the essential problem, acientists agree that there are many angles as vet not un A busy season of experimental i hroadcasting on both long and short D S aisn Go o o v : waves is to be conducted this Winter, &5 S Breamutertan Church. services. o \beginning within the next few weeks, it “Teates oran recital hy v the General Electric Co., accord: e e ing to plans announced yesterday. Fifteen licenses authorizing the use of n_varlety of wave lengths from 3 {0 379.5 meters have been assigned to the General Electric stations and per- mission granted to conduct experi- ments at any power desired and at almost any frequency. el : Wave Length Selection. Chicage: Chaped " service T WIS i Tt is expected that through the use g R e of one or more of the wave lengths, a 5 3 medium will be found that will pro- vide comparatively consistent trans- mission of broadcast programs to all parts of the earth. The record trans- mission of a broadcast program is held at present by station 2XAF, one of the 15 stations whose programs were picked up last Spring in Johannesburg, South Africa, and in [ Perth, Australia, being rebroadcast in prominent hy vin- listeners to Radiolas, Service ELECTRICAL CONSTRUCTION WM. P. BOYER CO. 812 13th St. M. 842 Tohn Corigliann Vnist, will be heard Station WRC, as with Allen MeQuhae in the Kent bhour te be hroadeast this evening Mr an previens Atwater Kent first time that ix vest soloist Methodist Locw s 1 Organ concert peapolin: Plymouth Atwater Cor . who has heen heard 2:00—Memphis: Se Hot Springs: First Dis Moines: Th 2 45— Chicagn . Organ anloist dur- hour, will tonight mare than Prompt and Reliable RADIO SERVICE Sets Repaired, Aerials Erected. Batteries and Tubes Inatalled. HARRY, C. GROVE, Inc. 1210 G St Main 2067 ine the rlay for h “Tononi” violin 200 years old. Among the selections listed on to- night's concert will he the Andante movement of the “Symphonic Espa- nole.” Rimsky-Korsakoff's “Hymn to the Sun” and “La Citana." hy Kreis ler, to he played as violin solos and “Come Tnto the Garden” “Who Is Sylvia™ and “My Gift for You™ to he sung by Mr. McQuhae. The Capitol Theater Family. reunited in New York under the direction of Maj. Fd- ward Bowes. will he heard in its rezular Sundav entertainment he- Seaside Hotel Ty Musical —Atlantic City Phiadelphia 2:00—New New Detroit Davenport York : Inspieation hour. ... ... ... Vork: Violin and piano seiections: Tha o Varmer Tittie Symphony: “soloist’ Paimer Littie Symphony’ 80 Skecles Biadle Cnapel hour of betier misic Trtendenominational services by New York Fed- ration” of CRUFCREs. -~ s xs- adeiia st 370 4 P b . L h Reisner's bhour. . . o t t T ow ou urning I l a st program l l A I % “anddevotic zinning 20 a'clock The vacations of the artists comprise the family are now at and and a full complement of the memhers ~ will he present at the mierophone from now on through the Winter. The las! of the absent memhers 1o return i David Mendaza, conductor af the Capitol Grand Orchestra, whe has heen on a holiday in Maine "his morning WRC will broadeast rhureh services from ANl Souls’ Un tarian Chureh, where the sermon will be delivered hy Rev. 1", Gi. B. Pierce, pastor. At 4 o'clock this afternoon the service at the Peace Cross will he hroadeast, who an Local Radio Entertainment s i Tnstrumental p al and instiume talks: s TO adelpina Farmers' hour: I Dance Qrchestra: Tro concert pi N String Minnie Weil, Studio concert Vark: Solow soloists. York 5 TO 5.00—Kansas City “ureh New Vork sopran York: Rom: ladeiph Orehwstra A1l evensong fron WDAF's Sabbath vespers 5 P news: sports. . st Sidage 6 rM. om t: Genia Ziel ikt Church Vs Hotel dinner concert 6 10 T PM. WIS Little Brown Church in the Vale: trio; e The Bank Jtondway favorites Bapiiat Church’ Carilion, Kans ot resuita: mews: Ehiren ervices _pitinurch: Base ba Nk Musicat results soiviat Carlo Orchestra. . WGy and : weather; CORgTes) both cities. The same programs were rebroadcast throughout the British Isles by the British broadcasting com- pany stations. The wave length that carried these programs and which provided the record transmission is 3z meters. Changes by Stations. Several changes have been made in the wave lengths used by others of the General Electric stations, 2XAD operating now on 20 and 26 meters; 2XX,. heard previously on 109, 100 and 65 meters, now heing operated perfodically on’ 140 meters. Station YXAH, the high wave station, has temporarily settled on 1,400 meters for_its signals. The other licensed General Electric stations are 2XAW, which uses the lowest waves—between 3 and 20 2X0, 2XH, 2XAC, 2XAZ, 2XAG, 2XAM, 2XI and 2XAE. The fifteenth station is the regular broadcaster, WGY. in operation in Washington. The set was built by Maj. Arm- strong to prove the practicability of the new type of receiver which he had invented. It is now in the historical collection of the Signal Corps in the office of the chief signal officer. Although the superheterodyne of to- day uses the same principles as were Armstrong elght years ago, there is, of course, a vast difference in appearance, the original flaving the tubes placed on top of the cabinet, using storage batteries, than now evolved by Maj. set and being considerably larger the “parlor” superheterodyne produced. No Loidy. From the London Humorist. “An' when Mrs. Grubbs sez preenit nojlatdy; et diliyer ey firmary,” and knocks ‘er down.” ‘Two negatives means a in- derstood, and that the future will re veal many practical uses of radio which are unknown today. Fortu nately, many of our investigators are not lacking in vision so that eventu ally, probably every possible use of radio will be developed Going back to the mystery. What, for example, do we know ahout the curious form of “Winter blanketing™ that interfered with reception last vear, or about fading, static? The use of radio for controlling mobile hedies, and the transmission of light, heat and power may be possible. But, ex- cept fer the controlling of mobile hodles, few experiments even have been carried on in these special prob lems. Short-wave transmission, the latest economical and practical means of communication, is still not thoi oughly understood nor mastered. Most engineers admit that we know little about what happens in the ether after a message leaves the station until it 0ld Orphan Set and Getting an Atwater Kent? Phone for Demonstration SMITH’S BATTERY AND RADIO SERVICE Sunday, Sept. 19, 1926. is received at another point and in this fleld alone considerable research must be carried out. Only a short time ago several Members of Con- gress indulged in a vigorous debate over what “ether” was, and as a re. sult the word, usually used to de- scribe the medium through which radio waves are sent, was left out of a blece of proposed legisiation, since the legislators could not agree on what it wak. Among a few of the other mysteries which still withstand the efforts of science and engineers are the effects of the Aurora Borealis and sun spots on radio and the cause of the so-called dead spots where reception of prac- tically any type of radio waves seems impossible. The adaptation of radlo has been applied to many practical uses bhe sides ordinary communleation. It is uged to operate relays which throw switches in power houses at consid- erable distances from the main plant; it is used in several ways to aid navi gators of the sea and air, and is now being adapted to railroads as a means of control and as a safety device. It also 18 found of great benefit in trans- mitting _practically throughout the world time signa which enable sci- entists and explorers to establish a curately points on the surface earth, Its 1se in peace is eral and its use in war includes many applications besides for communi tion, which the military and naval au- thorities will not reveal or discuss, Although many practical uses have Capitol Fan WCAE and V 30— Philad Bethan Calvary North 9928 2119 18th St. NW. - North 4896 Atwater Kent Radio—Exide Batteries NAA—Naval Radio Station, m:'vh gervices s Va. (1355 Meters). m Walout” Hiil's m. and 10:05 p.m. Radio, RADIO GOSSIP AND NEWS atfon of these stations for aircraft, it is anticipated, will be followed by the installation of other stations throughout the country as aviation progresses. The Navy dirigible Los Angeles will be used to calibrate the radio compass stations, it has been announced, and has already performed this service for the eight compass stations on the New England; coast. The Navy's compass service is be ing used extensively by vessels of all classes, over 150,000 bearings being en last year. It is anticipated that with the expansion of the service so as to give bearings to aircraft the stations will be kept almost con- stantly busy within a comparatively short time. The service, of course will be of inestimable value to avi- ators. particularly in foggy and stormy weather; when atmospheric condjtions prevent pilots from deter- mining their location by landmarks. Progiam trom WEAK Weather e irea Baptist Chiireh” se A world-wide project to determine the accuracy of present longitude lines will be undertaken October 1 by the Naval Observatory, one of the results of which will be to prove or | disprove the theory that the conti- nents are drifting apart. At least seven powerful radio sta- |tions in varfous parts of- the world will transmit time signals to be em- iployed in comparing clocks and chronometers at various pointsgwhere astronomical observations will be made. Both long waves and short et waves will be used by these stations L Atiantic "Gy, W .. |as a_precaution to insure the signals e a |at specified intervals of the day, re- i | gardless of atmospheric disturbances. While the chief object of the work is to determine the accuracy of the | established lines of longitude, scfen- tists engaged in the project also con- { sider it an opportune time for testing | the validity of the theory that the | continents “are drifting, which has | been developed as a result of astro- nomical observations, advanced by | Prof. Alfred Wegener, an Aus- | trian geophysicist. This theory will not he proved or disproved by the one | radio observation, it is explained, but similar investigations undertaken at five or ten year intervals will uiti- mately show whether there is any | difference in the distance hetween the varfous continents. T Eals. 00—New York: Baptist Church Cari Dallas: Rudio Hiole Class Chicago: Artist’ program WRC—Radio Corporation of i g1 in’ ie trio} " s Akt Whe 'Little Brown Church i’ the Vale: trio; (168.5 Meters). 11 a.m. Services from Al Souls’ Unitarian Church. Dr. 1. G. R. Pierce, pastor, will preach. 4 p.m.--Services held at the Peace Cross. broadcast from the National Cathedral. 6:20 pm. Musical program broad cast with WEAF from the Capitol heater. New York City, Maj. Edward Bowes, directing R:15 teo 5 p.m. Atwater Kent Radio Hour— Featuring John Corig lano, violinist, guest artist: Allen Mc- Quhae. tenor. with orchestra, broad cast with WEAF from New Yor Program follows: Opening air, M MeQuhae and orchestra; “Come Ini the Garden™ (Balfe), M orchestra; “Symphonie Pribipienan & Vices dante.” Mr. Corigliano and orchesir o Erarbyiarian rervices “Wha Is Syivia™ (Schubert), Me- ngfield: Address by the governors Quhae and orchestr mn to e il rehtlts % the Sun” (Rimsky-Korsakoff). (h) “La ) and vo Gitana™ (Kreisler). Mr. Corigliano and s piano: “My Gift For You™ (Cadmar 0 Mr. MeQuhae and orchestra; “Daddy” (Lemon-Behren). Mr. McQuhae and chestra: “Now the Day Is Over (Rarnhy), Mr. McQuhae and orchestra, 11:00—Hot_Springs: Base ball and sport summary Early Program Tomorrow. Hotel Orchestra ... ... 6:45 to 745 am. Tow Cincinnati - Vocal Minneapolis: Weathe S ercises, hroadeast with W the Metropolitan Tower. soloists sSpringfield Newark concert Pittsburgh Baltimore B—Cinennati Copley Paul Larg: orchestra Bethany broadeast . tenor: J itheran Church & WRAL Concert Orcheatra . . Chinies concert by Robert 8TO 9 Badgley 00—Cincinnati: S e .o Atlantic City aside “Hoiel Springfield: Golden Rule hour 8:15--New York: -Atwater Kent pi with orenestra. WEEL W WCCO and KSD from Philadelphia: Concert from and 30—Des Moines New York Fnsembie SR neinnati: Crosies Orchestra . 45— New York: Concert ensemble, WSAL » TO 10 mixed “pani Chrisianson’s Orchestra Play, “Ingomar, the Barbarian': 9.00—Zion, 1L: B iartet quarte sulos . Some Progress. From the New York Herald. The difference hetween the woman of today and the woman of yester. day is that the former's hair is off all the time, while the latter's was off only at night. ago York Chicago Pioneers imental soloists 10.30- Paul Manicipa - | Tube Tests Established. | Specifications for radio tubes to be {nsed by the various Government serv- 416.4 Palmer Symphony Orchesira: g e 193.6 woc 1155 a.m.— Arlington time sign: 17 Neon -Organ recital by He Smidt-Gregor, hroadcast from the Homer L. Kitt Studio. 1 p.m - Mever Davi: Hotel Orchestra, SENSITIVITY FACTORS IMPORTANT ON FARM Bureau of Standards, by Rough Treatment. Tests Radio Sets for Rural Use. New Willard Sensiiivity is the chlef requisite for an efficient receiving set for use on farms, because of the greater distances from broadeasting stations, it has heen determined by the radio laboratory of the Bureau of Standards, while the city dweller's chief need is selectivity, in order that-he may tune out signals Iogal stations and “pick up” trom a distance ondary requirements for a good farm receiver are ruggedness, that it may withstand shipment and use on farms. and simplicity of operation, with as few controls as possibly con sistent with satisfactory operation. The investigations at the Rureau of Standards were undertaken at the request of the Department of Azvicul ture in order that the farmers of the country who interested in receiv ing the market and other agricult reports which hrondeost may 1 advised regaPding the type of which is hest fitted for that purpose More than 5 sets of different types were ed by the Bureau. They were subjected io very rough treat ment. beinz shaken and jarred in mvery possible manner in simulation of the shocks which would be received in transit and were then examined for damage. such as unsoldered connec tions ov displaced hey were alzo tested for sensitivity and selec tvity. The sets were 1ated on five pointe: Sensitivity, selectivity, sim plicity of operation. ability te cover the broadcast hand from 200 to 360 meters and rugged construction. RECEIVERS ARE LIMITED. Greece Bans Private Sets That Can Listen-In on Federal Radio. Evidently planning to Jengths for official husiness a not want any one listening in of all privately owned radio receiving sete capable of picking up messages transmitted on 2000 meters or aver has been prohihited. Owners of such apparatus have been ordered to hring their sets to the telegraph. telephone and postal service to have them ad justed, so they will not receive above 2.000 meters. If the Greek fans possess any peity at all, it ix helieved them will he tempted to t their sets, even after adi made. to see what is on the they shouldn't hear Africa Vetoes Charleston. JOHANY respondence for runners in that it by bunching leg letic coaches and in their war on the new that the Charleston h papu.t-s!) as a result s the Greek government curi ~ome of nker with AugUST leston 21 (Con is bad checks speed local ath contend anee. It is declined agaias P 17:00—Des Moines Swise Garden frolie: Walter Cineinnati: Classical program . .WRRC Davidson's Louisville Loone : Sies 12 MIDNIGAT TO 1AM, Musical program . e Harry Hassall and his ‘svmphons orchestra. Blues and hallads by Miss +’ Davidson's Louisville Loons . WHO 26 CWFAA 435.9 WKRC John Smith and His Radio BY FREDERICK C. RUSSELL R05 Dallas LIRS 403 Car oweners throughout the world have followed John Smith in his daily matoring—and have bhenefited thereby. He also is a radio fan, and is avilling that his fellow fans should be amused and profit by his evening experiences. Smith has a faculty of “finding out things,” so it will pay vadio devotees to follow him in The Sunday Star each veek. Skin Effect.” “Smith had been reading some liter- ature concerning the superiovity of a make of he noticed that its merits s he rated in terms of its low resistance value. This started him thinking, and speculating Here was an electrical unit de- signed to handle a type of electric cur 1ent that could penetrate steel vaults, glass, brick walls and travel thou- sands of miles in all directions, and vet individuals were worrying over the resistance this Kkind of current might have o over when dash- ing rough a small ¢ Why worry ahout re ce when dealing with such an amazingly activ kind of energy? \Vhy consider a lit tlo extia 1esistance in a miniature coil when there is all the ether, all intenna, 11l the set wirin all the radiator pipes and all the ground for radio_energy to pass through Smith simply couldn’t see it. And then make matters wo 1 ex plained to him that it was largely due to a phenomenon commonly known as the “skin effect.” “What do you mean he asked “The skin effect is a peculiarity of radio frequencies as they thrgugh wires,” 1 explained. “But vou'll never get it straight until you understand the difference between di- rect and alternating currents. Travels on Wire Surface. ‘Direct current. the kind that goes onlv one way, has a much easier time of it traveling through a wire. If you take a thick wire and touch an elec irically charged wire to the center of \ cross-section of it you will find that the ecurvent travels not merely through the middle of the wire but also out to its edge. Repeat the ex periment. but touch the charged wire te the outside of the thick wire and the latter wiil carry the current straight to the center as well. This is quite the opposite of what vou wonld expect if vou know little Jout the characteristics of the two frerent kinds of current. Since alter- nating current demonstrates itself as heing so much more active, more un- controllable than the direct kind you would think that the former would saturate a wire more quickly than the latter, but that isn't the case at all Here is the less flexible direct current, capable of going only one way, satu- rating a_wire completely. The reason i= directly attributable to its steadier action. It has more time to adjust itself to its new environment. “Now alternating current is like the "zo-getter’ who does business with 4 1ot of merchants but who goes hack and forth over his territory so er- vatically that he veally doesn’t get to know any of them very .well. A steadier fellow might werk in a-much <maller tervitory and vet know more merchants and perhap: do more busi- ness. An uumchurmt. which particular coil when emed to ‘skin effect the | pass | |is what radio frequencies are, changes |ite mind so frequently when passing | through a much opportunity to become acquaint- ed. It just skims over the wire, ‘ No Current in Center. | “If you were to cut a cross-section in a wire and could measure the loca- tion of the current flowing through it. you would find that when charging it with radlo frequencies there wouldn't be any current at all in the | center. It would be all along the sur- | face—along the skin of the | These alternations may be at the.rate of a half million or mare times a. sec- cond, so vou readily can appreciate that there isn’'t going to be much time or them to penetrate into the center of any wire over which they are trav- eling. o stay on the wire at all. From this {vou can understand why radio fre quencies can jump Insulation and why they can develop such powerful mag- netic fields in a. set. “If you see what T mean by this | 'skin_effect’ business you will under- {stand why a given wire will handle |direct current with less resistance than it takes alternating currerft. It the alternating current flows only along the surface of the wire the ef- fect is the same as if the wire were { smaller. | “In handling radio frequencies, too, you must remember that the shorter the wave length and the higher the rate of alternations of the radio en- ergy, the less effective any given wire {18 as a conductor and the more re- | sistance it will show. That is why {you want to know, in buying coils, just what resistance they show for the sort of wave lengths for which vou will need to use them. And you can't afford to accept any vague rating of the ohmic resistance of the coil. " The cofl may show twice as much resist. ance for radio frequencies as for di- rect current.” By this time Smith was doing a lit- tle genuine thinking and the mystery of the “skin effect” seemed in a fair way to be solved. Next Week, No. 83: Receptive Moods. (Copyright by the Uliman Feature Service.) At g Irish to Mint Coins. Ireland is to mint her own coins for the first time in a hundred years. The law assimilatng Ireland's currency with that of England was passed in 1825, but the Free State Parliament recently decided to establish a token silver, nickel and copper coinage for amounts up to 40 shillings (about $10). Eminent artists have been asked to asslst the government in the designs of the new cains. The first Trish coins were struck by the Danish kings of bublin in the tenth or eleventh cen- tury, and in medievai times there were minta in Dublin, Warerford, Tuan and Drougheda. = wire that it doesn’'t have | wire. | They are fortunate to be able | Ifces have been established by the | Federal Specifications Board with a view to securing more uniformity and hetter construction of the tubes used | by the Navy and other departments. | . Tubes used by the Government, par- | ticularly in the Navy, and on afrcraft | operate under conditions vastly more i difficult tRan are encountered by tubes | used in broadcasting receivers, and, | while the Government specifications {will result in the production of the | highest possible types of tubes, it is not anticipated that any of the man- ufacturers will follow the same speci- fications in producing tubes for the general public. |"One of the tests which tubes of- |fered for Government use must meet |is that of a vibrating machine, which administers all manner of jars and jolts to a receiver in which tubes are placed, simulating the shocks which would be encountered in portable sets, on vessels, In the alr or under other unusual clrcumstances, Other tests cover insulation ance, filament rating, gas test. grid | characteristic test and mutual con- ductance test, while physical exam- ination covers the contact pins, insu lating disc, bulb area, markings, pos sible sag of grid or filament, ete. The tubes will be required to pass very rigorous tests, including one of 500 hours’ burning for determination of grid characteristics. resist- Big Stars to Be Heard. An impressive group of stars of the first magnitude will he offered the | radio public by A. Atwater Kent dur ing the winter series of Sunday pro grams which will begin October 3. Tt 1s planned to have the coming Winter season exceed even the standard set last vear, when Mr. Kent produced his first programs. ‘Among those already scheduled for early appearance in the new Atwater Kent series are such stars as Frances Alda, Lucrezia Bori, Mme. Schu- mann-Heink, Frieda Hempel, .Josef Hofmann, Kdward Johnson, Albert Spalding, Maria Kurenko, Louise Homer, Reinald Werrenrath, Mar- garet Matzenauer, Mary Lewis, Rosa Ponselle and Charles Hackett. Through an arrangement with the Metropojitan Grand Opera Company of a sort never before effected by any outside agency, Mr. Kent has secured the call on the services of the artists of that great organization for radio appearances. This connection will en- | able him ta put on the air, in the | course of this new series, a number | of artists not heretofore available for | | broadcasting hecause of their engage- | | ments with the Metropolitan. | | The new series of Atwater Kent | programs will be on the air each | Sunday night from 9:15 to 10:15 o'clock Eastern standard time. They will be | hroadcast through a hook-up of 15| | stations, as _follows: WEAF, New York: WJAR. Providence: WEEI, Roston: WSAI, _Cincinnati; WRC, Washington: WCCO, Minneapolis-St Paul; WEAR, Cleveland; WLIB, Chi- cago: WFI and WOO. aiternating. at Philadelphia; WCAE, Pittsburgh; WGR, Buffalo: WOC, Davenpor WTAG, Worcester; KSD, St. Loui and WWJ, Detroit. To Extend Compass Service. Efforts of the Government to en- courage commercial aviation will be furthered by the expansion of the radio compass stations of the Navy Department so as to furnish to air craft the same compass service as is now furnished to ships at sea. | The stations which will be used for | this service are all located along the Atlantic coast, and, being calibrated for service seaward only, it will be necessary to calibrate them landward as well before the proposed service can be inaugurated. Successful oper- m in musical reproduction requires the power of RCA Loudspeaker 104 Hear ordinary radio—you may find it won- derful. Hear the Loudspeaker 104 and you will never be content with ordinary radio. Its remarkable tone range and its power have brought a reality to radio reproduc- tion that music never knew before, in any type of reproducing instrument. Loud or soft, it is clear and real! And it is not just an experiment, but tried and roved—in thousands of homes. It was ahead of its day, and now it has gone through a period of perfecting that puts it shill far abead. - RADIO CORPORATION OF AMERICA NewYork Chicago %an Prancisco RCALoudspeaker104, complete, $275 Operates on $0-60 cycle, 110 volt A. C. lighting cir- cuit. Eliminates the "B’ teeries of most sets. With RCA Radiols 25 or 28, particularly fine, and (with an adapter) it eliminates wll bateries. @ RCA Loudspeaker | MADE BY THE MAKERS OF THE RADIOLA The “Mountie” isn’t lonely any more QQ)HEN the supply ship steams south from the last outpost of civilization in September, not to return until the following July, loneliness will never again beset the lives of the Royal Canadian Mounted Police who patrol the vast, wild area. Radio is now brightening the long winter nights with music, special programs, messages and greetings from their “home folks.” And in the receiving sets of the “Mounties™ is the best equipment obtainable. The batteries they use must "RADIO QUALITY ly Low Terms Satisfy Everything That RCA Is Good in Radio Home of Perfect Dismonds And Our Unusu RCA Look for the Schwartz 4 708 7th Street NORTHWEST 3123 M Street GEORGETOWN be dependable. They must serve until new supplies are brought in a year later. oAsk any Radio Engineer BURGESS BATTERY COMPANY GENERAL SALES OFFICE: CHICAGO Canadian Factories and Offices: Niagara Falls and Winnipeg BURGESS RADIO BATTERIES i T i BURGESS RADIO A 'BURGESS | - BATTERY. WHOLESALE DISTRIBUTORS RCA~—Radiola MADE BY THE MAKERS OF RADIOTRONS National Electrical Supply Co. 1328-1330 N. Y. Ave. Washingto Phone Main 6800 ~ X A Fresh Supply of Burgess Batteries Can Be Had at THE POST RADIO 816 F-St. NW. WHOLESALE DISTRIBUTORS Burgess Batteries National Electrical Supply Co. 1328-1330 N. Y. Ave. Phone Main 6800 Washington, D. C.