A text-book on chemistry. For the use of schools and colleges (1866)
Draper, Henry, 1837-1882 · New York, Harper & brothers · leaf 140
of two kinds, the plate machineand the cylinder. They derive their names from theshape of the glass employed to yield the electricity.The plate machine, Fig. 87, consists of a circular plateof glass, a a, which can be turned upon an axis, b, by Describe Fig. 86. Describe Dufays discovery. What… … Fig. 88. means of a winch, c ; at d is apair of rubbers, which com-press the glass between them,and a piece of oiled silk ex-tends over the glass plate, asshown at e. In the same man-ner, on the opposite side of theplate, there is another pair ofrubbers, c?, and an oiled silk, e ;f\% the prime…
Chemistry · Physics
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