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

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1ſelf: It conſiſts of two principal parts; a
glaſs Veſſel, and a Pump to draw the Air
out of it.

The former of theſe (which we, with
the Glaſs men, ſhall often call a Receiver,
for its affinity to the large Veſſels of that
name, uſed by Chymiſts) conſiſts of a
Glaſs with a wide hole at the top, of a
cover to that hole, and of a ſtop-cock
faſtned to the end of the neck, at the
bottom.

The ſhape of the Glaſs, you will find
expreſſ'd in the firſt Figure of the annex
ed Scheme. And for the ſize of it, it
contain'd about 30 Wine Quarts, each of
them containing near two pound (of 16
Ounces to the pound) of water: We
ſhould have been better pleaſ'd with a
more capacious Veſſel, but the Glaſs-men
profeſſed themſelves unable to blow a
larger, of ſuch a thickneſs and ſhape as
was requiſite to our purpoſe.

At the very top of the Veſſel, (A) you
may obſerve a round hole, whoſe Dia
meter (B C) is of about four inches; and
whereof, the Orifice is incircled with a
lip of Glaſs, almoſt an inch high: For
the making of which lip, it was requiſite
(to mention that upon the by, in caſe

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