| Boyle, Robert New experiments physico-mechanicall, touching the spring of the air and its effects 1660 |
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a Liquor, we inclin'd the Engine that con
tain'd it, sometimes to one side, and some
times to the other; and observ'd the
smoak to keep its surface almost Hori
zontal, notwithstanding the stooping of
the Vessel that held it, as Water or an
other Liquor would in the like case have
done.
And if by a quicker rocking of the
Engine the smoke were more swiftly sha
ken, it would, like Water, either Vibrate
to and fro from one side to the other of
the Glass, or else have its surface manifest
ly curll'd with Waves, but preserve its
self in an intire and distinct Body from the
incumbent Air; and being permitted to
rest awhile, would soon recover its for
mer smooth and level superficies: If also
the Key were turn'd and the Valve un
stopp'd, so that there was a free, though
but a narrow passage open'd betwixt the
external Air and the cavity of the Recei
ver, then would some of this smoak fall
down, as it were, in a stream into the sub
jacent Cylinder, and a proportionate
quantity of the outward Air, would ma
nifestly ascend through it into the incum
bent Air, much after the same manner as
if you invert a Viol with a long Neck, and
well fill'd with Red-Wine, into a Glass
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