The principles underlying radio communication (1922)
United States. National Bureau of Standards, Ould, Richard Sheldon, 1889-, United States. Army. Signal Corps · Washington, Govt. Print. Off. · leaf 43
for various initial reference temperatures. SeeTable 21, Circular 74. 10. Current Control.—In electrical work the need is constantlyarising for adjusting a current to a specified value. This isusually done by varying the resistance of the circuit. Changesin the resistance of a circuit can be made… … Pidl resistance b*A Plu£ resistance box. Resistance Wire called resistance boxes or rheostats, depending on theircurrent-carrying capacity and range. A resistance box consists of a group of coils of wire assem-bled compactly in a frame or box. (Figs. 11, 12, and 13.)It is so arranged that single…
Telegraph, Wireless · Radio
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