| 单词 | mercurial pendulum |
| 释义 | > as lemmasmercurial pendulum mercurial pendulum n. a compensation pendulum with a cylindrical bob containing mercury, whose upward expansion by heat counteracts the lengthening of the rod. ΘΚΠ the world > time > instruments for measuring time > clock > [noun] > pendulum clock > pendulum pendule1660 pendulum1660 simple pendulum1673 bob-pendulum1685 swing1696 quicksilver pendulum1726 pendle1741 gridiron pendulum1751 mercurial pendulum1786 gridiron1793 wanrest1794 seconds pendulum1795 conical pendulum1813 ticker1821 noddy1844 1786 E. Chambers Cycl. (new ed.) III. at Pendulum The mercurial pendulum was the invention of Mr. Graham..in 1715. 1819 A. Rees Cycl. XXVI. at Pendulum Graham's mercurial pendulum..may be considered as the first compensating pendulum. 1881 F. J. Britten Watch & Clockmakers' Handbk. (ed. 4) 84 In the mercurial pendulum the jar of mercury does not answer so quickly to a change of temperature as the steel rod. 1962 E. Bruton Dict. Clocks & Watches 112 Mercurial pendulum, a form of temperature compensation invented by George Graham in 1721. < as lemmas |
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