A Discourse of the Rule of the Decrease of the Height of the Mercury in the Barometer
FIRST EDITION of Halley's important paper detailing his unprecedented mathematical description of the relationship between barometric pressure and altitude above sea level. In addition, Halley may have been the one to coin the term "barometer" in this paper. This issue of Philosophical Transactions also includes Cassini's discovery of two new Saturnian satellites. While much of Aristotelian theory had been firmly discarded by the 17th century, Aristotle's idea that meteors were an atmospheric phenomenon perservered. "The first serious challenge to Aristotle's meteor hypothesis was proposed by Edmund Halley, Astronomer Royal. Unlike Aristotle, Halley continually tried to measure quantities. The height of the Earth's atmosphere is a typical example… In [his Discourse] he calculated that the atmosphere only extended to a height of some 40 to 45 miles. So if meteors were ignited exhalations, they had to occur below this height" (Physicists Look Back: Studies in the History of Physics, ed. John Roche). IN: Philosophical Transactions of the Royal Society of London, Issue No. 181 pp. 104-116. London: Royal Society of London, 1686. The complete issue, no. 181, pp. 77-123. Small quarto, sympathetically rebound in modern three quarter calf over marbled boards. A few spots to text, generally fine condition.
$450 (Retail)