1proportion theſe decrements of the Mer
curial Cylinder did proceed: partly be
cauſe (as we have already intimated) the
Quick ſilver was ſoon drawn below the
top of the Receiver: and partly becauſe,
upon its deſcent at each exſuction, it
would immediatly reaſcend a little up
wards; either by reaſon of the leaking of
the Veſſel at ſome imperceptible hole or
other, or by reaſon of the motion of
Reſtitution in the Air, which, being ſome
what compreſt by the fall as well as weight
of the Quick ſilver, would repell it a lit
tle upwards, and make it vibrate a little up
and down, before they could reduce each
other to ſuch an Æquilibrium as both
might reſt in. But though we could not
hitherto make obſervations accurate e
nough concerning the meaſures of the
Quick-ſilver's deſcent, to reduce them in
to any Hypotheſis, yet would we not diſ
courage any from attempting it: ſince, if it
could be reduc'd to a certainty, tis proba
ble that the diſcovery would not be un
uſeful.
curial Cylinder did proceed: partly be
cauſe (as we have already intimated) the
Quick ſilver was ſoon drawn below the
top of the Receiver: and partly becauſe,
upon its deſcent at each exſuction, it
would immediatly reaſcend a little up
wards; either by reaſon of the leaking of
the Veſſel at ſome imperceptible hole or
other, or by reaſon of the motion of
Reſtitution in the Air, which, being ſome
what compreſt by the fall as well as weight
of the Quick ſilver, would repell it a lit
tle upwards, and make it vibrate a little up
and down, before they could reduce each
other to ſuch an Æquilibrium as both
might reſt in. But though we could not
hitherto make obſervations accurate e
nough concerning the meaſures of the
Quick-ſilver's deſcent, to reduce them in
to any Hypotheſis, yet would we not diſ
courage any from attempting it: ſince, if it
could be reduc'd to a certainty, tis proba
ble that the diſcovery would not be un
uſeful.
And, to illuſtrate this matter a little
more, we will adde, That we made a ſhift
to try the Experiment in one of our above
mention'd ſmall Receivers, not containing
more, we will adde, That we made a ſhift
to try the Experiment in one of our above
mention'd ſmall Receivers, not containing
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