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

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1ficult a matter, to keep out the Air from
getting at all in at any imperceptible hole
or flaw whatſoever, in a Veſſel immedi
ately ſurrounded with the compreſſed At
moſphere, that in ſpight of all our care
and diligence, we never were able totally
to exhauſt the Receiver, or keep it when
it was almoſt empty, any conſiderable
time, from leaking more or leſs: although
(as we have lately intimated) by unwearyed
quickneſs in plying the Pump, the inter
nall Air can be much faſter drawn out
then the external can get in, till the Re
ceiver come to be almoſt quite empty.
And that's enough to enable men to diſ
cover hitherto unobſerved Phænomena of
Nature.

The Experiments therefore of the firſt
ſort, will, I fear, prove the onely ones
wherewith my Avocations will allow me
to entertain Your Lordſhip in this Letter.
For till your further Commands ſhall en
gage me to undertake, by Gods permiſ
ſion, ſuch an Employment, and more lea
ſure ſhall better fit me for it, I know not
whether I ſhall be in a condition to try
what may be done, to enable me to give
you ſome account of the other ſort of
Experiments alſo.

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