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 176
Fig. 134. Fig. 133. … varnished table will not aiford this. To discharge the same,apply one of the balls of the Plain or Jointed Dischargers^Figs, 133, 134, to the outside coating, and bring the other tothe knob of the jar.^ gard to the above directions, the Plate Machine may be made to operate bril-liantly during a…
Physics
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