| 释义 |
Jolly, n.3|ˈdʒɒlɪ, ˈjɒlɪ|
The name of P. von Jolly (1809–1884), German physicist, used attrib. († or in the possessive) to denote a balance invented by him, used esp. in determining the specific gravities of minerals, in which the elongation of a helical spring when a body is hung on it indicates the weight of the body.
1882A. Geikie Text-bk. Geol. ii. ii. 93 Jolly's spring balance is a simple and serviceable instrument. 1906J. P. Iddings Rock Minerals ii. 92 By means of a Jolly balance or spring..the specific gravity of a crystal may be found with approximate accuracy. 1964J. Sinkankas Mineral. for Amateurs vii. 187 In the homemade Jolly balance shown.., a specimen attached by thread to the lower hook of the spring carries it down a certain distance which can be measured. |