A system of natural philosophy, designed for the use of schools and academies (1845)
Moffat, J[ohn] M. [from old catalog] · Philadelphia, E. C. Biddle · leaf 432
Describe the essential parts of Nairnes electrical machine. … 430 ELECTRICITY. of it is sewed a flap of oiled silk, which extends loosely over thecylinder, to within an inch of a row of brass pins or pointed wiresproceeding from the side of the opposite conductor. The conduc-tor to which the cushion is attached is called the negative con-ductor, and the…
Physics
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