A practical Treatise on Wireless Telegraphy and Telephony, giving Complete and Detailed Explanations of the Theory and Practice of Modern Radio Apparatus and its Present Day Applications, together with a chapter on the possibilities of its Future Development
WIRELESS TELEGRAPHY 123
The receptor was an ordinary selenium cell, placed at
the focus of a large reflector and connected with a tele-
phone receiver and battery. No difficulty was encountered
in reproducing the speech over varying distances up to
about three miles.