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 438
e or barn: in the centre a small squarepiece is fitted loosely into a corresponding cavity; and diagonallyacross the moveable square passes a brass wire, C D. When thisinstrument is used, the brass knob A must be brought near to the How is the divergence of the hair, and similar effects on the… … 436 ELECTRICITY. knob of a charged jar, with the outside ofwhich is connected a chain attached to thebrass wire B; thus the jar will be dis-charged, and its electricity will passthrough the knob and wire A to B;but the interruption occasioned by theposition of the square in the centre willcause it…
Physics
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