In recognition of his having conducted the most successful radio show in the U.S. Alfred Stern, director of Washington's first radio show, was presented with this elaborate loop antenna by Dr. J. Harris Rogers, famous inventor. It is estimated that 50,000 persons attended this exhibition

Inventor Dr. James Harris Rogers with his loop aerial antenna inventions

The first radio beacon is inaugerated. An executive photograph showing Dr. George K. Burgess, Director fo the United States Bureau of Standards, and the aircraft radio beacon at College Park, Maryland, designed for guiding airplanes by radio. This is the first radio beacon for use of civil aviation

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

A new use for discarded automobile horns has been discovered by Dr. Wm. C. Fowler, health officer of Wash., D.C. Dr. Fowler has adapted an old rams-horn type auto horn, a relic of the days when they blew them with bulbs, and fitted it to his radio to serve as a loud speaker. This gives as good a ton

If you happen to be commander of a Navy ship you will be happy to know about this new piece of mechanism. It is the result of the combined efforts of various branches of the Navy Dept. It is a theodolite (compass for measuring the horizon) that will be used on Navy ships. Mr. R.L. Currie of the aero

Testing installation for broadcasting the Inauguration, 2/27/29

Device takes time signal from pendulum of clock. ingenius apparatus takes a time signal from the pendulum. A clock without mechanical contact and the time thus. accurate to a small fraction of a second variation. day. This device was invented by R.E. Gould, Chief of Time Section of the

Motion pictures by radio coming soon. Motion pictures by radio is very near, predicts C. Francis Jenkins, who has designed this small radio- vision receiving set for use in the homes. It is only a few inches square and is attached to the regular radio receiving set. A miniature motion picture screen