1Sucker were drawn nimbly down.
We noted too, that when we began to
empty the Receiver, the appearances of
Light were much more conſpicuous
then towards the latter end, when little
Air at a time could paſs out of the Re
ceiver.
empty the Receiver, the appearances of
Light were much more conſpicuous
then towards the latter end, when little
Air at a time could paſs out of the Re
ceiver.
We obſerv'd alſo, that when the Suc
ker had not been long before well Oyl'd,
and inſtead of the great Receiver, the
ſmaller Veſſel above-mention'd was em
ploy'd; We obſerv'd, I ſay, that then,
upon the opening of the Stop-cock, as
the Air deſcended out of the Glaſs in
to the empty'd Cylinder, ſo at the ſame
time there aſcended out of the Cylinder
into the Veſſel a certain Steam, which
ſeem'd to conſiſt of very little Bubbles,
or other minute Corpuſcles thrown up
from the Oyl, rarefied by the attrition it
ſuffered in the Cylinder. For at the
ſame time that theſe Steams aſcended
into the Glaſs, ſome of the ſame kinde
manifeſtly iſſued out like a little Pillar of
Smoke at the Orifice of the Valve, when
that was occaſionally open'd. And theſe
Steams frequently enough preſenting
themſelves to our view, we found, by
expoſing the Glaſs to a clear Light, that
ker had not been long before well Oyl'd,
and inſtead of the great Receiver, the
ſmaller Veſſel above-mention'd was em
ploy'd; We obſerv'd, I ſay, that then,
upon the opening of the Stop-cock, as
the Air deſcended out of the Glaſs in
to the empty'd Cylinder, ſo at the ſame
time there aſcended out of the Cylinder
into the Veſſel a certain Steam, which
ſeem'd to conſiſt of very little Bubbles,
or other minute Corpuſcles thrown up
from the Oyl, rarefied by the attrition it
ſuffered in the Cylinder. For at the
ſame time that theſe Steams aſcended
into the Glaſs, ſome of the ſame kinde
manifeſtly iſſued out like a little Pillar of
Smoke at the Orifice of the Valve, when
that was occaſionally open'd. And theſe
Steams frequently enough preſenting
themſelves to our view, we found, by
expoſing the Glaſs to a clear Light, that
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