Boyle, Robert - New experiments physico-mechanicall, touching the spring of the air and its effects

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1of the inverted Tube into the Veſſell'd
Mercury, you may obſerve a bubble of
Air to aſcend from the bottom of the
Tube through the ſubſiding Quick-ſilver
to the top; and almoſt always you may,
if you look narrowly, take notice of a
multitude of ſmall bubbles all along the
inſide of the Tube betwixt the Quick
ſilver & the glaſs: (not now to mention the
Particles of Air that lye conceal'd in the
very Body of the Mercury) Many of
which, upon the Quick-ſilvers forſaking
the upper part of the Tube, do break in
to that deſerted ſpace where they finde
little or no reſiſtance to their expanding
of themſelves. Whether this be the rea
ſon that upon the Application of warm
Bodies to the emptyed part of the Tube,
the ſubjacent Mercury would be depreſſ'd
ſomewhat lower, we ſhall not determine;
though it ſeem very probable, eſpecially
ſince we found that upon the application
of Linnen cloaths dipped in Water, to
the ſame part of the Tube, the Quick
ſilver would ſomewhat aſcend, as if the
cold had condenſ'd the Impriſon'd Air,
that preſſ'd upon it, into a leſſer room.
But that the deſerted ſpace is not wont to
be totally devoid of Air, we were induc'd

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