Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 537
, and that shown by excited resin, sealing-wax, amber,■&C., was named resinous electricity. These names have now been respec-tively replaced by the terms positive and negative. It must be understoodthat these terms imply no actual excess or defect, but are purely distin-guishing terms, just as… … Fig. 253.—A simple Electro-scope, 486 ELECTRICITY. electricity is developed are carefully examined: it is found that one kindis never produced without the other simultaneously appearing. Thus, thesilk which has been used for rubbing the glass in the above experiments,will be found to exhibit the…
Inventions
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