1ing made of much purer and clearer me
tall, as the Glaſs-men ſpeak, then the
great Receiver, we might have a more
perfect view of every thing happening
within them. The next, that ſuch ſmall
Veſſels might be empty'd with leſs la
bour and in much leſſe time. The third,
that this nimble exſuction of the ambient
Air would make many changes in the
Bodies ſhut up in theſe glaſſes more ſud
den and conſpicuous then otherwiſe they
would prove. And the laſt, that we ſhould
be able to draw and keep out the Air much
more perfectly from ſuch ſmall Veſſels
then from our large Receiver. But though
we were not much diſ-appointed in the
expectation of the three firſt advantages,
yet we were in our hopes of the fourth.
For beſides the great difficulty we found
in fitting together the Glaſſes, the Stop
cocks and the Covers; beſides this I ſay,
we found our ſelves ſeldom able to draw,
and keep out the Air ſo far as to make the
remaining Air in theſe Receivers weaker
then the remaining Air in our great Recei
ver. For though ſometimes the Leaks
of ſome of theſe little Receivers may be
much either fewer or ſmaller then thoſe
of the larger Veſſel; yet a little Air get-
tall, as the Glaſs-men ſpeak, then the
great Receiver, we might have a more
perfect view of every thing happening
within them. The next, that ſuch ſmall
Veſſels might be empty'd with leſs la
bour and in much leſſe time. The third,
that this nimble exſuction of the ambient
Air would make many changes in the
Bodies ſhut up in theſe glaſſes more ſud
den and conſpicuous then otherwiſe they
would prove. And the laſt, that we ſhould
be able to draw and keep out the Air much
more perfectly from ſuch ſmall Veſſels
then from our large Receiver. But though
we were not much diſ-appointed in the
expectation of the three firſt advantages,
yet we were in our hopes of the fourth.
For beſides the great difficulty we found
in fitting together the Glaſſes, the Stop
cocks and the Covers; beſides this I ſay,
we found our ſelves ſeldom able to draw,
and keep out the Air ſo far as to make the
remaining Air in theſe Receivers weaker
then the remaining Air in our great Recei
ver. For though ſometimes the Leaks
of ſome of theſe little Receivers may be
much either fewer or ſmaller then thoſe
of the larger Veſſel; yet a little Air get-