Boyle, Robert New experiments physico-mechanicall, touching the spring of the air and its effects 1660

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243
them bemore exactly try'd by the Tori­
cellian Experiment, if we could get Tubes
so accurately blown and drawn, that the
Cavity were perfectly Cylindrical.

To dwell upon all the several Refle­
ctions, that a speculative Wit might
make upon this and the foregoing Expe­
riment: (I mean the thirty third and thir­
ty second, would require almost a Vo­
lume, whereas our occasions will scarce
allow us time to touch upon three or
four of the chief Inferences that seem de­
ducible from them, and therefore we shall
content our selves to point at those
few.

And first, as many other Phænomena
of our Engine, so especially, the two
lately mention'd Experiments, seem ve­
ry much to call in question the receiv'd
Opinion of the Nature or Cause of Su­
ction. For 'tis true indeed, that when men
suck, they commonly use some manifest
endeavour by a peculiar motion of their
Mouthes, Chests, and some other conspi­
ring parts, to convey to them the body
to be suckt in. And hence perhaps they
have taken occasion, to think that in all