Niaudet, Alfred, 1835-1883. [from old catalog], Fishback, L. M., [from old catalog] tr · New York, J. Wiley & sons · leaf 131
g-paper. Sir William Thomson recom-mends sawdust instead of sand. The zinc is of con-vex form, in order to permit the freeing of bubbles ofhydrogen which sometimes form themselves in DanielPsbattery. in TWO-LIQUID BATTEKIES. These batteries last eighteen or twenty months uponimportant telegraph… … Em. 27. At the top there is a plate of zinc, at the bottom aplate of copper, and between the two a considerablethickness of blotting-paper. The upper half of the blot-ting-paper is wet down wh*h a concentrated solution ofsulphate of zinc, and the lower half with sulphate ofcopper. We have,…
Electric batteries
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