The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)
Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 209
A highlyamusing illustration of electrical reliction^ may be shown bythe Electric Season-Mac/mie, Fig. 175. Here an arrangement representing the sun, earth,and moon, is balanced on apoint upon the top of aninsulating post. From eachof these bodies and themain wire project points.When electrified… … Fig. 175.
Physics
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