Radio inspectors now on the job. Watch out for the ------ Radio inspectors will get you! Broadcasting stations that do not keep on their own wave LE may expect to receive a hurry call from a person resembling a physician with a medical case---In fact, however, he is RA Inspector with a portable freq

Setting the clocks hands by radio. U.S. Dunmore Bureau of Standards who adopted clock to radio control

P.T. Russell of Navy Yard with ocean depth finder, 4/27/26

The latest in radio development which has been perfected by Mr. H.P. O'Reilly of Wash., D.C.

Federal Radio Com., 5/6/29

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

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

Measuring relative humidity by radio. Washington, D.C. June 9. The hair element for measuring relative humidity in radio weather sounding balloons has proved innacurate because of very slow response at the cold temperatures encountered in the upper atmosphere. F.W. Dunmore, Radio Engineer of Nationa

The yardstick is being applied to the measuring of radio waves by means of parallel device of galvanometer, the radio laboratory of the Bureau of Standards has succeeded in measuring very short radio waves, only ten meters in length