| 单词 | gold leaf electroscope |
| 释义 | > as lemmasgold leaf electroscope attributive. Designating scientific instruments in which the movement of a piece of gold leaf is used to detect (the magnitude of) an electric current, as gold leaf electrometer, gold leaf electroscope, gold leaf galvanoscope, etc. Now chiefly historical. ΚΠ 1788 Philos. Trans. (Royal Soc.) 78 8 The first plate A is placed upon the gold-leaf electrometer. 1804 C. H. Wilkinson Elements Galvanism II. xxv. 308 (heading) The exquisite sensibility of the fibres of a frog to electricity, compared to the gold-leaf electroscope. 1812 H. Davy Elements Chem. Philos. 168 An insulated gold leaf electrometer. 1832 P. M. Roget Treat. Electr., Galvanism, Magnetism, & Electro-magnetism viii. 45/1 The construction of the Gold-leaf Galvanoscope is similar to that of Bennet's electrometer. 1866 R. M. Ferguson Electricity 53 A gold leaf electroscope. 1937 Ann. Sci. 2 167 Cumming..described what may be looked upon as a forerunner of the string galvanometer. This was the gold-leaf galvanometer, in which a gold leaf stretched vertically in a glass tube was included in the circuit. 1995 E. A. Davis Sci. in Making I. vi. 296 A charged brass ball, suspended by a thread, is lowered inside a pewter vessel connected on its outside to a gold-leaf electrometer. 2002 F. Close et al. Particle Odyssey ii. 22 (caption) The gold-leaf electroscope..was one of the earliest instruments used in studying electrical phenomena. < as lemmas |
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