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

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

G.M. Clemence Ast. Astronomer file records from the reorder. On the right is the time signal transmitting clock connected by direct wire to Arlington and Annapolis. All signals are broadcast from there and also from San Francisco to Honolulu and Balboa

Bureau of Standards. the apparatus shown in this photograph represents a simple and readily usable arrangement of the interferometer for standardizing indicators, extensometers, etc.

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

You have heard. Sollenburger over the radio. time signals from the U.S. Observatory at Wash. Apparatus is one of the most powerful in the world

Naval Observatory tran. clock, switchboard & chronograph time rec. *Abstract/medium:; 5 x 7 in. or smaller

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

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