Modern electricity and magnetism, theoretically and practically considered (1885)
Avery, Elroy M[cKendree], 1844- [from old catalog] · New York and Chicago, Sheldon and company · leaf 76
Fig. i68. pane. On the upper side of the pane directly over this pointed con-ductor, place a drop of oil to prevent the spark from gliding overthe surface of the glass instead of passing through. From an in- 246 FitiCTIONAL DLECTitiCITT. sulated support, lower a second pointed conductor until it…
Electricity · Magnetism
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