An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 325
Fig. 201. — Positive and negative plates of an Edison storage cell. plated steel grid holding a number of perforated rectangularpockets, which are filled with powdered iron oxide. Theseboxes are assembled in the grid and subjected to pressure toweld the joints and to corrugate their surfaces. In…
Electricity · Magnetism
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