| 释义 |
baroscope|ˈbærəskəʊp|
[f. Gr. βάρο-ς weight + -σκοπος -observing, -observer.]
†1. An instrument for indicating variations in the density of the atmosphere; a kind of barometer.
(The Statical Baroscope or Barometer of Boyle consisted of a large glass bubble exactly balanced by a small brass weight; increased density of the atmosphere giving greater support to the bubble, but not sensibly affecting the brass weight, the rise or fall of the former corresponded to that of the mercury in a barometer.)
1665Phil. Trans. I. 31 A Baroscope, or an Instrument to shew all the Minute Variations in the Pressure of the Air. 1675Phil. Trans. X. 490 That useful instrument the Baroscope, telling the changes of the weather beforehand. 1751Chambers Cycl. s.v. Barometer, The baroscope..in strictness, being a machine that barely shews an alteration in the weight of the atmosphere..To measure how much that difference is..is the business of the barometer.
2. An instrument designed, when placed under the air-pump, to show that bodies in air lose as much weight as that of the air they displace.
1881in Syd. Soc. Lex. |