Wireless Telegraphy and Telephony
Forfatter: Alfred P. Morgan
År: 1917
Forlag: The Norman W. Henley Publishing Company
Sted: New York
Udgave: Third Edition, Fully Illustrated
Sider: 33
UDK: 621.396.1 Mor
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
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Wireless Telegraphy
CHAPTER' I.
INTRODUCTORY: WIRELESS TRANSMISSION AND RECEPTION.
THE ETHER. ELECTRICAL OSCILLATIONS. ELECTRO-
MAGNETIC WAVES.
Wireless telegraphy, that marvelous art which has made
possible the instantaneous transmission of intelligence be-
tween widely distant parts having no apparent physical
connection save that of the earth, air, and water, is one of
those wonders of science which appeal to the average
mind as either incomprehensible or only explainable through
the use of highly technical language. Contrary to this gen-
eral opinion, however, the whole theory and practice of
the wireless transmission of messages is capable of the
simplest explanation.
Fig. i.—Throw a stone into a pool of water and little waves will
radiate from the spot where the stone struck.
I