Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 558
this cylinder m, but separated from it by a thin insulating bush-ing of boxwood (in fig. 336 the section of boxwood is representedin black), is inserted another brass cylinder n n, which projectsbeyond the tube in both directions, and carries upon its project-ing portions two other steel…
Electrical engineering
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