1or more above the ſurface of that in the
Veſſel; of which I know not whether it
will be needful to aſſign ſo obvious a cauſe
as that, though the little Air remaining
in the Receiver could not hinder a Cylin
der of above an Inch high of Quick-ſilver
from ſubſiding; yet it might very well
be able, by its preſſure, to countervail the
weight of a Cylinder of a Foot long or
more, of a Liquor ſo much leſs ponderous
then Quick-ſilver, as Water is. And in
fine, to conclude our Experiment, when
the Water was drawn down thus low, we
found, that by letting in the outward Air,
it might be immediately impell'd up a
gain to the higher parts of the Tube.
Veſſel; of which I know not whether it
will be needful to aſſign ſo obvious a cauſe
as that, though the little Air remaining
in the Receiver could not hinder a Cylin
der of above an Inch high of Quick-ſilver
from ſubſiding; yet it might very well
be able, by its preſſure, to countervail the
weight of a Cylinder of a Foot long or
more, of a Liquor ſo much leſs ponderous
then Quick-ſilver, as Water is. And in
fine, to conclude our Experiment, when
the Water was drawn down thus low, we
found, that by letting in the outward Air,
it might be immediately impell'd up a
gain to the higher parts of the Tube.
We will adde no more concerning this
Experiment, ſave that having try'd it in
one of our ſmall Receivers, we obſerv'd,
That upon the firſt exſuction of the Air
the Water did uſually ſubſide divers In
ches, and at the ſecond (exſuction) fall
down much lower, ſubſiding ſometimes
near two Foot; as alſo that upon the let
ting in of the Air from without, the Wa
ter was impell'd up with very great ce
lerity.
Experiment, ſave that having try'd it in
one of our ſmall Receivers, we obſerv'd,
That upon the firſt exſuction of the Air
the Water did uſually ſubſide divers In
ches, and at the ſecond (exſuction) fall
down much lower, ſubſiding ſometimes
near two Foot; as alſo that upon the let
ting in of the Air from without, the Wa
ter was impell'd up with very great ce
lerity.