A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 240
th figures. Figures, Lichtenbergs Dust — Figures produced by writing on a sheet of shel-lac with the knob of a charged Leyden jar andthen sprinkling over the sheet dried andpowdered sulphur and red lead, which have been previously mixed together, and are sorendered, respectively negative and… … Fig. 254. Lichtenbergs Dust Figures. These figures show very clearly that an electriccharge tends to creep irregularly over the surfaceof an insulating substance. Figures, Magnetic A name some-times applied to the groupings of iron filingson a sheet of paper so held in a magnetic fie^das to be…
Electricity · Electrical engineering
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