Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 92
f=^ F* … Fig. 89.—Elements of Carbon Cylinder Cell with Depolarizer.Zinc, manganese dioxide in a porous cup and sal-ammoniac solution. manganese and then sealed in. The zinc rod is prevented fromtouching the carbon by being first inserted through a porce-lain insulator. About 4 to 6 ounces of sal-anniioniac…
Electricity · Magnetism
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