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: This keyboarded and encoded edition of the work described above is co-owned by the institutions providing financial support to the Early English Books Online Text Creation Partnership. Searching, reading, printing, or downloading EEBO-TCP texts is reserved for the authorized users of these project partner institutions. Permission must be granted for subsequent distribution, in print or electronically, of this text, in whole or in part. Please contact project staff at eebotcp-info@umich.edu for further information or permissions.
Subject terms: Physics -- Early works to 1800.; Chemistry -- Early works to 1800.; Medicine -- 15th-18th centuries.
Link to this Item: http://name.umdl.umich.edu/A28936.0001.001
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 June 15, 2024.

Pages

Page 17

EXPERIMENT X. An easie way of making a small Quantity of In∣cluded Air raise 50 or 60 Pound or a greater Weight in the Exhausted Receiver.

TO demonstrate more obviously the Air's Spring, we took a* 1.1 Brass Cylinder whose Depth was 4 Inches and it's Diameter 4 Inches and ¾, to which we adapted a† 1.2 short Plug, to whose upper Basis was fixed a broad Rim for Weights to stand on more firmly; which being done we pressed a Bladder into the Cylinder, that it might adapt it self to the Cavity of it; and then, observing, how much the Plug was above the surface of the Cylinder, we laid the Weights upon it (see Plate the 2d Figure the 5th) and observed that the Air in a Cylinder about 4 Inches broad lifted up 75 pound at the 5 Exsuction so high that one might discern the Mark;* 1.3 and at 2 Exsuctions more it was elevated 3/10 above the Top of the Cylinder, and at the same time, in a Mercurial Gage the Mercury that usually stood at ⅛ above the highest Glass Mark subsided to ⅛ below the Second. When the Air was let into the Receiver again, after some time the Bladder subsided again, and being taken out exactly answered the Cavity of the Cylinder. The Receiver being again exhausted at the 24th Exsuction the Mercury in the Gage was de∣pressed to the lowest Mark, and at the 35th to ⅛ below it.

And the former Experiment being tryed in a small Receiver in which we heaped flat Weights one upon another, the Air raised 100 pound