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 177
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 damp day and in a cold room ; although a warm and dryatmosphere is much more favorable. *… … 141. The Electric Battery^ Fig. 135, is a series of LeydenJars, with their inside coatings connected, and also their outside. To discharge the same, place oneball of the discharger on the brassknob at the side of the case, orthe object through which the dis-charge is to be made, and bringthe other…
Physics
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