The works of the Honourable Robert Boyle, Esq., epitomiz'd by Richard Boulton ... ; illustrated with copper plates.
About this Item
Title
The works of the Honourable Robert Boyle, Esq., epitomiz'd by Richard Boulton ... ; illustrated with copper plates.
Author
Boyle, Robert, 1627-1691.
Publication
London :: Printed for J. Phillips ... and J. Taylor ...,
1699-1700.
Rights/Permissions
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Subject terms
Physics -- Early works to 1800.
Chemistry -- Early works to 1800.
Medicine -- 15th-18th centuries.
Cite this Item
"The works of the Honourable Robert Boyle, Esq., epitomiz'd by Richard Boulton ... ; illustrated with copper plates." In the digital collection Early English Books Online 2. https://name.umdl.umich.edu/A28936.0001.001. University of Michigan Library Digital Collections. Accessed May 1, 2024.
Pages
EXPERIMENT XXV.
HAving fill'd a Wide-mouth'd Jar, with about half a Pint of Common Water; we sunk two Glass-Viols, whose Shape and Size is represented by the Eighth Figure, one of which contain'd just so much of a Ponderous Mercurial Mixture, as was requisite to sink it, when co∣ver'd with white Wax; the other being weigh'd down by Water, and the Mouths being down∣wards; the Quantity of Water contain'd in the former, filling three Parts of four of the Glass, the Air contain'd in the latter being equal in Dimensions to a Pea.
These being let down into the Receiver, upon plying the Pump, at the last so many Bubbles
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rose up to that which swam upon the Water, as were able, by expanding themselves, to cause some of the Water to fly out, and make the Viol emerge to the Top of the Water contain'd in the Jar; where at every Exsuction it conti∣nu'd to expand, till it was able to raise up the side of the Viol, and in part to evacuate it self; upon which it presently swam upon the Water, as before, and eight times after discharg'd a Bubble of Air about the Size of a Pea; but, when we permitted the Air to enter in again, it presently subsided to the Bottom. As for the other, it continu'd at the Bottom all the while. But some time after, the Pump being ply'd, it rais'd it self considerably; but about sixty Parcels of Air as big as Peas, finding vent, and getting out, it presently subsided; tho' upon a further Expansion of the Air, it rose again, and subsided, which successive Ascent and descent, it continu'd Nine times after after the Pump ceas'd working; but when the Air was again let in, it was presently fix'd at the Bottom. From which Experiment, that Hydrostatical Rule, That a Body will swim in the Water, if it be lighter than its equal Proportion in Bulk, will appear to be likewise true, when the Weight of the Atmosphere is taken off.
Notes
Concerning the Air's Gravity, and Expan∣sion under Water.