. The Ontario high school physics. is placed at the bottom. The copper sulphate being denser than the zinc sulphate, sinks to the bottom, while the zinc sulphate floats above about the zinc plate. The copper sulphate solution is kept concentrated by placing crystals of the salt in a basket in the .outer vessel (Fig. 490), or at the bottom about the copper plate (Fig. 491). Tlie Daniell cell is capable of Fio. 491.—Gravity cell. Z, zinc plate; . ..A, zinc sulphate solution; B, copper giving a continuous current tor sulphate solution ; C, crystals of copper an indefinite period if the materials
. The Ontario high school physics. is placed at the bottom. The copper sulphate being denser than the zinc sulphate, sinks to the bottom, while the zinc sulphate floats above about the zinc plate. The copper sulphate solution is kept concentrated by placing crystals of the salt in a basket in the .outer vessel (Fig. 490), or at the bottom about the copper plate (Fig. 491). Tlie Daniell cell is capable of Fio. 491.—Gravity cell. Z, zinc plate; . ..A, zinc sulphate solution; B, copper giving a continuous current tor sulphate solution ; C, crystals of copper an indefinite period if the materials are renewed at regular intervals; but the strength of the cur-rent is never very great because the internal resistance is These cells are adapted for closed circuit work, when acomparatively weak current will suffice. The gravity type hasbeen extensively used on telegraph lines, but in the largerinstallations the dynamo and the storage battery plants arenow taking their place. The of the cell is about CELLS 407
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectphysics
