The boy's own book of indoor games and recreations : a popular encyclopædia for boys (1890)
Stables, Gordon, 1840-1910, Hutchison, George Andrew, 1841-1913 · Philadelphia : J.B. Lippincott · leaf 443
^ weather the cake willremain electrical for weeks, but it is ^letter to recharge it each time it is used Donot let your clothes get too near tne electrophorus during your experiment, and keep … Fig. I. all pointed things as far away from it as possible. An eight-inch electrophorusought to give an inch spark if properly made and charged. To charge the Leydenjar, all you have to do is to hold the knob near the cover and take from fifty to ahundred sparks. You should have the electrophorus…
Games · Amusements
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