Radio for everybody; being a popular guide to practical radio-phone reception and transmission and to the dot-and-dash reception and transmission of the radio telegraph, for the layman who wants to apply radio for his pleasure and profit without going into the special theories and the intricacies of the art (1922)
Lescarboura, Austin C. (Austin Celestin), 1891- · New York, Scientific American publishing company [etc.] · leaf 174
e battery may be tested bymeans of a hydrometer or a voltmeter. The hydrometeris an instrument which measures the specific gravity ofthe storage battery liquid or electrolyte, to give it thetechnical name. The cap or plug of each cell of storagebattery is removed, and the hydrometer tube is… … Xarge loop antenna employed for the reception of trans-Atlantic messages by a New York newspaper. The loop is mounted so that it can be orientated or pointed towards the transmitting station. 156 RADIO FOR EVERYBODY readily determined, and the relative charge of the cell ob-tained in this manner,…
Radio
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