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
Summary
Public domain historical photo, free to use, no copyright restrictions image - Picryl description
Tags
Date
01/01/1924
Contributors
Harris & Ewing, photographer
Location
Source
Library of Congress
Copyright info
No known restrictions on publication.