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* 1.1IN Prosecution of what was deliver'd in the foregoing Experiments, We filled a Glass call'd a Philosophical Egg with common Water, about a Foot and a half high; it being large enough to contain about nine Ounces, and the Diameter of the Neck being, at the Top, half an Inch, and at the Bottom an Inch; this being put into the Receiver, and the Pump ply'd,
when the Air was pretty well exhausted, several Bubbles rose to the Top and broke; but all of them finding an easy Passage through the Water, did not elevate it as when they ascend∣ed in a narrower Cylinder; but upon an Admis∣sion of Air into the Receiver again, the Water was sensibly depressed.
To try whether distilled Water was more subject to expand than common Water; I put two Ounces of it into a Glass Bubble, which wrought to the Middle of it's Neck; but it neither swelled nor yielded Bubbles upon an Exsuction of the Air.
But having put distilled Water into two di∣stinct Philosophical Eggs, the Neck of the for∣mer being straitned with a Glass Tube, we plac'd them in the Receiver, and found a mani∣fest Difference upon the Exsuction of the Air; for in that which was straitned, the Air ma∣nifestly elevating the Water, several Bubbles were gather'd about the bottom of the Glass Tube; whereas in the other Egg, the Water was not in the least elevated; and though the Bubble in the last-mentioned, disappear'd upon the Re-ingress of the Air, those above the Tube continu'd visible, only a little contracted, for a considerable time; the Surface of the Water, which was before elevated, being de∣pressed lower than when first put into the Egg.
And after a days time having again ply'd the Pump, we observ'd, That the Bubbles were so much drawn out before, that we could scarce discern a Bubble in either; but that in which the Cylindrical Tube was plac'd, swell'd the
Breadth of a Barly Corn, tho' the other did not; yet, in the former, upon a Re-ingress of Air, it subsided again, and whether that Swelling was caus'd by the Rarefaction of the Water, or the Spring of some latent airy Parts, is not easy to determine.
The Subject of the for∣mer Expe∣riment pro∣secuted.