Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 19
ottom of beaker, when the boardrests on its top. Fit the upper end with a metal ball.Any size, solid or hollow makes no difference. 20 ELEMENTARY ELECTRICITY Put a circle of shellac varnish on the under side ofboard and lay board on beaker so that chain touches bot-tom. When shellac dries the board… … Fig. 3. Discharger or Discharging Tongs for Leyden Jar. Electroscope. A wide-mouthed fruit jar is taken and a cork or woodstopper made to a loose fit. Drill a hole through the stopper and insert a glass tubeabout four inches long projecting equally on both sides. Take a small metal rod or heavy…
Electricity
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