COPYRIGHTED, 1925, BY
JENKINS LABORATORIES, INC.
WASHINGTON, D. C.
¶_To the splendid young folks, Sybil L. Almand, Florence M. Anthony,
John N. Ogle, James W. Robinson, Stuart W. Jenks, and Thornton P.
Dewhirst, who so efficiently assisted in the attainment of Photographs
by Radio, Radio Vision, and Radio Photograms, this book, in grateful
appreciation, is dedicated._