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 74
into the tube. The specific gravity of the electrolyteis ascertained by the position in which the hydrometer floats.For many types of portable batteries the cell is considered dis-charged when the specific gravity has fallen to 1.140. The nickel-iron cells have an open-circuit voltage which… … Cof>|>er wireCell <,over Qldnd nn^Stoffin^fe, box ^SKet Weld tb CoverS^acin^ WdsherConnecting rodPositive ^ridC\r\d se^aarvitorSeamless .stoel rir^s fosJtiVe tube^ du4>^ension hoa Fig. 30.—Storage cell of nickel-iron type having alkaline electrolyte. voltage falls gradually from…
Telegraph, Wireless · Radio
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