Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 83
. PRIMARY CELLS 63 Separating the Elements.—Obviously the positive andnegative elements of a cell must not be in contact within theexciting fluid; they should be separated by a space of ^ to Y2inch. In the case of cells without porous cups, periodic atten-tion must be given to ensure this condition… … Figs. 67 to 69.—Variour zincs: fig. 67 Crowfoot; fig. 68 Lockwood; fig. 69 fire alram. being very marked when the solution is a saturated one. Thespace between these crystals and the side of the jar acts as anumber of capillary tubes, and draws up more liquid, whichitself evaporates and deposits…
Electrical engineering
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