EXPERIMENT XII. Tryals representing the Force of the Spring of Ʋncom∣press'd Air upon Staple Bodies.
The I. TRYAL.
HAving cemented a Glass Plate upon the Brass Hoop, mention'd in the Seventh Ex∣periment, and joyn'd the other Orifice of the Hoop
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.
- 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 451
with Cement to the Pump, upon that, a Large Receiver was fix'd: So that the Hoop supply'd the place of a Receiver, and the Receiver kept the Atmosphere from pressing upon it; yet, upon an Exsuction of the Air out of the Hoop, the Spring of that contain'd in the Receiver, broke the Glass Plate into an hundred pieces.
The II. TRYAL.
AND a Receiver shap'd like a Tumbler, which was capable of containing only a sixth part of what the Large Receiver did, being made use of, the Spring of so small a Quantity of Air, presently shatter'd the Glass Plate in pieces.
The III. TRYAL.
* 1.1BUT a Large square Glass capable of hold∣ing a Pound, being made use of instead of the Hoop and the Glass Plate, upon the Exsu∣ction of the Air, it was broke in pieces, both when the Large Receiver was whelm'd over it; and likewise, when a Receiver not much higher than it self was made use of.
In which Experiments we observ'd, That the Air making a greater Pressure on the Sides of the Bottles, than the Top, first broke them. And it was further observ'd, in the last Experiments, that the Glasses did not fly in pieces, till some time after the last Exsuction.
But lest it should be question'd, Whether the Glasses were broke by the Pressure of the Air in the Receiver, we repeated one of the former
Page 452
Tryals, with the Brass Hoop, leaving a commu∣nication betwixt the Receiver, and the Cavity of the Hoop, a small Tube, whose Cavity was no wider than the Diameter of a Hair, being lodg'd in Part of the Cement; and upon plying the Pump, we found, that the Air, having a free tho' a small Vent out of the Receiver, did not break the Plate as before.
Yet notwithstanding, if the Air be suck'd out of the Hoop too fast, that in the Receiver, not finding quick Vent, will break the Glass Plate, the Pressure of the Air in the Receiver, being too strong to be ballanc'd, by the Resistance of the Air in the Hoop: And for a like Reason a slender Pipe, blown at the Flame of a Candle, up∣on it's first Removal into the Cold, hath it's sides, if thin, squeez'd nearer together, the Pressure of the Outward Air being greater than the Resi∣stance of the Internal.
Notes
-
* 1.1
The Force of the Air's Spring.