Atkinson, Philip. [from old catalog] · New York, The Century co. · leaf 109
bythe concave groove which it forms in the inclosing plate,so as to be firmly held in place. A number of these plates are then placed in a tank containing a solution ofzinc chloride, in contactwith solid plates of zinc,which alternate withthem, where they remainforty-eight hours. Thiscombination is… … Fig. 38. only a porous crystalline structure of pure lead, sup-ported by the solid lead-frame. The pores in the pas-tilles are at right angles to the surface of the plate, andcan easily be seen by a magnifying glass 5 a few of thembeing roughly represented by the small holes surround-ing the…
Electricity
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