National Geographic : 1924 Mar
To the Million orMore Members of the Radio Broadcasting Public, Elgin Makes This Announcement- THROUGH the cooperation of the Chicago Board of Trade and the Elgin Time Observatory, a new time broadcasting service has been put into effect. Three times daily the precise time supplied over direct wire from our Ob servatory is broadcast through Station WDAP (360 meters, 833 kilocycles), at 3:12, 5:57 and 10:57 p.m. -extending over three minutes each period-the final signal is given at 3:15, 6:00 and 11:00 p.m. precisely. Starting at 3:12 p.m., a dot is heard each second for 29 seconds. The 30th second is silent. Then again a dot each second for 25 seconds. Then 5 seconds of silence. This completes one minute of broadcasting. The second minute duplicates the first. The third minute also -29 dots, 1 second silence; 25 dots, 5 seconds silence. Then a long dash is heard at exactly 3:15 p.m. This is Central Standard Time. Now, with this time-broadcasting service, the Elgin Time Observatory assumes a new and broader significance than ever before. Itwill bring home to every listener-in the professional timekeeping standards embodied in the Elgin Watch. ELGIN The Professional Timekeeper ELGIN NATIONAL WATCH COMPANY ELGIN, U.S. A.