1from pumping) by the bare application
of a hand moderately warm to the deſert
ed part of the Tube, the remaining Wa
ter would be ſpeedily and notably de
preſſ'd. And having for a while held a
kindled Coal to the outſide of the Tube,
(the Pump being ſtill unimploy'd, becauſe
the Veſſel chanced to hold extraordinarily
well) the Air was by the heat ſo far ex
panded, that it quickly drave the Water
to the bottom of the Tube, which was
divers Inches beneath the ſurface of the
ambient Water. Whereby it appears (by
the ſame way by which we formerly mea
ſur'd the dilatation of the Air) that the
Air, even when it is expanded to between
90 and 100 times, its extent will yet rea
dily admit of a much further rarifaction
by heat.
of a hand moderately warm to the deſert
ed part of the Tube, the remaining Wa
ter would be ſpeedily and notably de
preſſ'd. And having for a while held a
kindled Coal to the outſide of the Tube,
(the Pump being ſtill unimploy'd, becauſe
the Veſſel chanced to hold extraordinarily
well) the Air was by the heat ſo far ex
panded, that it quickly drave the Water
to the bottom of the Tube, which was
divers Inches beneath the ſurface of the
ambient Water. Whereby it appears (by
the ſame way by which we formerly mea
ſur'd the dilatation of the Air) that the
Air, even when it is expanded to between
90 and 100 times, its extent will yet rea
dily admit of a much further rarifaction
by heat.
I conſider'd alſo that in caſe the Bub
bles we have been ſpeaking of, were pro
duc'd by the parcels of Air latitant in the
Water, that Air being now got together
to the top of the Tube, though the Air
were again drawn out of the Receiver,
the taking off its preſſure would not diſ
cloſe bubbles as before; and accordingly,
the Air being again pump'd out, the Wa
ter in the Tube deſcended as formerly:
bles we have been ſpeaking of, were pro
duc'd by the parcels of Air latitant in the
Water, that Air being now got together
to the top of the Tube, though the Air
were again drawn out of the Receiver,
the taking off its preſſure would not diſ
cloſe bubbles as before; and accordingly,
the Air being again pump'd out, the Wa
ter in the Tube deſcended as formerly:
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