American cryptographer William Friedman with a (AT&T subsidiary) Western Electric-manufactured printing telegraph.

Colored radio recorder is latest in radio receivers. E.B. Judson of the Bureau of Standards and his two colored radio recorder, automatically recording signals in two colors, red and black. This automatic receiver is capable of receiving signals from American or European stations

Decoding Chief at the State Dept. Washington, D.C., July 31. David Salmon, Chief of the Division of Communications and Records at the State Department is kept very busy decoding all the messages for the president that are coming thru the State Dept. from the China Japan hostilities. The messages are

W.F. Friedman, 3/4/24

Alexander Friedberg, radio operator. He puts the dispatcher on the air for calls and is responsible for keeping the equipment in order, 10/38

W. F. Friedman

W.F. Friedman, expert of the Army Signal Corps

Direct Radio Telegraphic communication between the United States and Spain was officially opened at the offices of the R.C.A. Communications in Washington this morning. Mariano de Amoedo, charge d'affaires of the Spanish Embassy is shown pressing the telegraphic key opening the service. The King of

New wireless teletypewriter. Washington, D.C., Oct. 15. A new radio teletypewriter service permitting instantaneous transmission of written records without the aid of wires, has been perfected by the experts of the Bureau of Air Commerce, Department of Commerce. Commerce officials said a chain of te