1as occaſion requir'd, to make uſe of ſuch
Tubes, as if no ſuch holes had been left
in them; by deviſing ſtopples for them,
made of the common Plaiſter call'd Dia
chylon: which I rightly enough gheſſ'd,
would, by reaſon of the exquiſite com
mixtion of its ſmall parts, and cloſeneſs
of its texture, deny all acceſs to the ex
ternal Air. Wherefore, ſuppoſing that
by the help of ſuch Plaiſters, carefully
laid upon the commiſſures of the ſtopple
and hole to be made in the Receiver, the
external Air might be hindred from inſi
nuating it ſelf between them into the Veſ
ſel, we cauſ'd ſeveral ſuch Glaſſes, as
you will finde deſcrib'd a little lower, to
be blown at the Glaſs-houſe; and though
we could not get the Work-men to blow
any of them ſo large, or of ſo conveni
ent a ſhape as we would fain have had; yet
finding one to be tolerably fit, and leſs
unfit then any of the reſt, we were con
tent to make uſe of it in that En
gine: Of which, I ſuppoſe, you by this
time expect the Deſcription, in order to
the Recital of the Phænomena exhibited
by it.
Tubes, as if no ſuch holes had been left
in them; by deviſing ſtopples for them,
made of the common Plaiſter call'd Dia
chylon: which I rightly enough gheſſ'd,
would, by reaſon of the exquiſite com
mixtion of its ſmall parts, and cloſeneſs
of its texture, deny all acceſs to the ex
ternal Air. Wherefore, ſuppoſing that
by the help of ſuch Plaiſters, carefully
laid upon the commiſſures of the ſtopple
and hole to be made in the Receiver, the
external Air might be hindred from inſi
nuating it ſelf between them into the Veſ
ſel, we cauſ'd ſeveral ſuch Glaſſes, as
you will finde deſcrib'd a little lower, to
be blown at the Glaſs-houſe; and though
we could not get the Work-men to blow
any of them ſo large, or of ſo conveni
ent a ſhape as we would fain have had; yet
finding one to be tolerably fit, and leſs
unfit then any of the reſt, we were con
tent to make uſe of it in that En
gine: Of which, I ſuppoſe, you by this
time expect the Deſcription, in order to
the Recital of the Phænomena exhibited
by it.
To give your Lordſhip then, in the
firſt place, ſome account of the Engine it
firſt place, ſome account of the Engine it