1the Incumbent Mercury. Whence I in
ferr'd (as eaſily I might) that, if the Ex
periment could be try'd in our Engine, the
Quick-ſilver would ſubſide below 27 Di
gits, in proportion to the exſuction of
Air, that ſhould be made out of the Re
ceiver. For, as when the Air is ſhut in
to the Receiver, it does (according to
what hath above been taught) continue
there as ſtrongly compreſſ'd, as it did
whil'ſt all the incumbent Cylinder of the
Atmoſphere lean'd immediatly upon it;
becauſe the Glaſs, wherein it is pent up,
hinders it to deliver it ſelf, by an expanſi
on of its parts, from the preſſure where
with it was ſhut up. So, if we could per
fectly draw the Air out of the Receiver,
it would conduce as well to our purpoſe,
as if we were allow'd to try the Experi
ment beyond the Atmoſphere.
ferr'd (as eaſily I might) that, if the Ex
periment could be try'd in our Engine, the
Quick-ſilver would ſubſide below 27 Di
gits, in proportion to the exſuction of
Air, that ſhould be made out of the Re
ceiver. For, as when the Air is ſhut in
to the Receiver, it does (according to
what hath above been taught) continue
there as ſtrongly compreſſ'd, as it did
whil'ſt all the incumbent Cylinder of the
Atmoſphere lean'd immediatly upon it;
becauſe the Glaſs, wherein it is pent up,
hinders it to deliver it ſelf, by an expanſi
on of its parts, from the preſſure where
with it was ſhut up. So, if we could per
fectly draw the Air out of the Receiver,
it would conduce as well to our purpoſe,
as if we were allow'd to try the Experi
ment beyond the Atmoſphere.
Experi
ment 17.
ment 17.
Wherefore (after having ſurmounted
ſome little difficulties which occurr'd at
the beginning) the Experiment was made
after this manner. We took a ſlender and
very curiouſly blown Cylinder of Glaſs,
of near three Foot in length, and whoſe
bore had in Diameter a quarter of an Inch,
wanting a hairs breadth: This Pipe being
Hermetically ſeal'd at one end, was, at
ſome little difficulties which occurr'd at
the beginning) the Experiment was made
after this manner. We took a ſlender and
very curiouſly blown Cylinder of Glaſs,
of near three Foot in length, and whoſe
bore had in Diameter a quarter of an Inch,
wanting a hairs breadth: This Pipe being
Hermetically ſeal'd at one end, was, at