. Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity . Fig. 21. Fig. 22. Gravity Cell. Where one of the two liquids used in a cellis heavier than the other, their difference in specific gravity maybe depended upon to keep the liquids separate, instead of using aporous cup. The heavier li(piid then remains at the bottom of thecell and the lighter one forms a layer above it. Fig. 23 showssuch a cell, which is the same as the Daniell cell except that noporous cup is use
. Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity . Fig. 21. Fig. 22. Gravity Cell. Where one of the two liquids used in a cellis heavier than the other, their difference in specific gravity maybe depended upon to keep the liquids separate, instead of using aporous cup. The heavier li(piid then remains at the bottom of thecell and the lighter one forms a layer above it. Fig. 23 showssuch a cell, which is the same as the Daniell cell except that noporous cup is used. A copper plate at the bottom is suiToundedby crystals of copper sulphate and covered Avith a solution of thesame. The zinc is supported above this and in a dilute solutionof sulphuric acid or zinc sulphate. The copper sulphate solutionbeing the heavier remains at the bottom and prevents two solutions do not remain entirely separated, however, asthe heavier solution slowly diffuses upward. Dry Cell. In this cell, which is more properly called a moistcell, the usual liquid solutions are dispensed with, and in place ofthem tlic* cell is provided with substance
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