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

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1ally ſuppoſing the dilatation not to be re
ſtrain'd by the Bladder.

SInce we wrote the other day the former
Experiment, we have met with ſome
Glaſſes not very unfit for our purpoſe;
by means of which we are now able, with
a little more trouble, to meaſure the ex
panſion of the Air a great deal more ac
curately then we could by the help of the
above-mention'd Bladder, which was
much to narrow to allow the Air its ut
moſt diſtention.

We took then firſt a Cylindrical Pipe
of Glaſs, whoſe bore was about a quarter
of an Inch in Diameter: this Pipe was ſo
bent and doubled, that, notwithſtanding
its being about two foot in length, it
might have been ſhut up into a ſmall Re
ceiver, not a Foot high: But by miſ
fortune it crack'd in the cooling, whereby
we were reduced to make uſe of one part
which was ſtraight and intire, but exceed
ed not ſix or ſeven Inches. This little
Tube was open at one end; and at the
other, where it was Hermetically ſeal'd,
had a ſmall Glaſs bubble to receive the
Air whoſe dilatation was to be meaſur'd.

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