Elementary treatise on electricity and magnetism : (1905)
Foster, G. C. (George Carey), 1835-1919, Joubert, J. (Jules François), 1834-1910, Porter, Alfred W. (Alfred William), 1863-1939 · London ; New York ; Bombay : Longmans, Green, and Co. · leaf 35
of gold - leaf suspended closetogether from an insulated metal stem.To protect the gold - leaves from air-currents and from mechanical injury,they are surrounded by a glass bell-jar, through the top of which themetal stem projects, being terminatedby a ball or sometimes by a metalplate. The… … Fig. 7. upper ends 80 that theirare a little above the bottom of the strips of gold-leaf. When the electroscope is entirely unelectrified, the two gold-leaves hang vertically face to face; but a very small degree ofelectrification causes them to stand apart at the bottom, theamount of divergence…
Electricity · Magnetism
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