International Library of Technology · Scranton, International Textbook Co. · leaf 303
er forms of Daniell cell, 1.07 volts. 2666. The maintenance of this type of cell is simple,it only being necessary to renew the supply of copper sul-phate crystals when the solution becomes weak, which isindicated by the fall of the blue-colored liquid below the topof the copper cathode; besides… … 2667. With the crowfoot form of zinc there is consid-erable waste, due to the size of the **stub which is leftwhen the zinc has been consumed so that it can not be used.Several forms of zincs havebeen designed to prevent thiswaste as far as possible. 2668. One form, used bythe Baltimore (Md.) Fire…
Electrical engineering
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