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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Fig. 103.—Telefunken wireless wagon set in operation at Fort Leavenworth, Kansas. The aerial is of
the umbrella type supported by a steel pole resting on a porcelain base.