The transmitter unit in the rear of the experimental 2-way communication car. It is installed behind the rear seat, 10/38

Sergeant Frank M. Beall, in charge of the station, seated in the experimental 2-way communication car. He is removing the telephone transmitter to make a call, 10/38

Police radio station in Washington, D.C., 10/38

Auto equipped with radio (made for Pot. Elec. Power Co.)

U.S. Chief Signal Officer (G.S.Gibbs?) inspects new radio equipment for talking to Aviators in flight. The new aircraft-radio equipment designed by both the Signal Corps of the War Department permits of both radiotelephone and radiotelegraph communication, sending, receiving, at the same time. The a

Portable trailer in use in blind landings. Washington D.C. This portable trailer where all the equipment is enclosed can be easily transported to any position on the Airdrome so that the pilot can approach the field into the wind for his landing. All the beam control is dispatched from this trailer

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

Boy Scouts to broadcast Jamboree. Washington D.C. June 26. Larry Le Kashman, of New York City, with the short-wave radio sending and receiving set loaned to the Boy Scouts for their National Jamboree in Washington. A special license was issued by Federal Communications Commissions for the set, which

Safety device for blind landing of air-track. Washington D.C. The monitoring device of the air-track blind landing in the above photo tells the man on the ground if all the beams are being sent out correctly if there is any error in transmission of the beams this machine will pick It up immediately