File:The philosophical works of the Honourable Robert Boyle esq.- abridged, methodized, and disposed under the general heads of physics, statics, pneumatics, natural history, chymistry, and medicine (1725) (14782569584).jpg

Identifier: philosophicalwor02boyl (find matches)
Title: The philosophical works of the Honourable Robert Boyle esq.: abridged, methodized, and disposed under the general heads of physics, statics, pneumatics, natural history, chymistry, and medicine
Year: 1725 (1720s)
Authors: Boyle, Robert, 1627-1691 Shaw, Peter, 1694-1763. ed
Subjects: Physics Chemistry Medicine
Publisher: London, W. and J. Innys (etc.)
Contributing Library: Princeton Theological Seminary Library
Digitizing Sponsor: Princeton Theological Seminary Library

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xtant above the orifice of the veifel, we laid theweights upon the plug, whofe lip hinderd it from being deprefled toodeep into the cavity of the veffel; and, having conveyd them into the re-ceiver, we found, that a common half hundred weight would very foonbe manifeflly raifed by the fpring of the included air.•^ In another experiment, the bladder in a cylinder four inches broad, raifed 75 pound weight, till the wooden plug difclofcd the mark defignd to fhewthe height at which the air kept the plug, before it was comprelVed ; andthis, vilibly, at the fifth exfudion ; and at the feventh, that mark was raifedr-s- above the edge of the cylinder. In the gage, where the mercury, inthe open air^ ufually flood, about an eighth above the uppermoft glafs-mark, it was deprefled an eighth below the fecond mark; and after wekt in the air. it was a pretty while before the weight manifeftly began tolubfide,. The bladder being taken out, and the place it had poffeffed, in the cylinder: PilATE^OXC
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Fhyfico-mechanical Experiments. 515 ■cylinder being fupplyd with a fleeve, or fome fuch thing, and the weight pneumatics.laid again upon the plug ; we found, that, at twenty-four exfuftions, the ^^-^^^^^-mercury was deprefled to the loweft mark of the gage; and the thirty-fourth, or thirty-fifth exfndion was made, before the receiver appearedto be fo exhaufted, as to flop the finking of the mercury, which was thenabove one eighth beneath the loweft mark. But, having cauled leaden-weights to be, purpofeiy, caft flat, ard as broad as we could convenientlyput into the receiver, that, by the advantage of this ftiape, we might beable to pile up the more of them, without much danger of their beingihaken down ; we laid feveral of them one upon another : and, then, theupper part of the receiver growing too narrow to admit any more; weadded a weight, or two, lefs broad ,• when, exhaufting the receiver, tillwe perceived, by the gage, that the air was manifeftly withdrawn; \refound, by the h

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