File:TheoryOfExperimentalElectricity Electrometer.jpg
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English: In the form of electrometer shown, the design of which is due to Dr F. Dolezalek, the suspension is a very fine quartz fibre, and is made into a conductor by coating it with a trace of a hygroscopic substance like calcium chloride, which always remains moist. The needle is of very light silvered paper, and the sensitiveness is so great that the needle need only be kept at a potential of 50 to 200 volts. A constant potential can be secured by connecting the fibre with one pole of a battery or dry pile, the other pole of which is put to earth. |
| Date | |
| Source | Picture and figure description taken from: William Cecil Damper Whetham, The Theory of Experimental Electricity, Cambridge University Press, London, 1905 Online, Figure 24a, Page 45, Chapter II |
| Author | William Cecil Damper Whetham |
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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| current | 19:14, 25 May 2011 | | 645 × 773 (66 KB) | Wdwd (talk | contribs) | == Summary == {{Information |Description={{en|In the form of electrometer shown, the design of which is due to Dr F. Dolezalek, the suspension is a very fine quartz fibre, and is made into a conductor by coating it with a trace of a hygroscopic substance |
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