| Boyle, Robert New experiments physico-mechanicall, touching the spring of the air and its effects 1660 |
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continu'd suspended, began freely to drop
down again as formerly.
And if you
take a Glass Pipe, whether it be in the
form of a Siphon, or no, that being for
the most part of the thickness of a Mans
Finger, is yet towards one end so slen
der, as to terminate in a hole almost as
small as a Horse-hair; and if you fill this
Pipe with Water, you will finde that Li
quor to drop down freely enough tho
row the slender Extream: But if you then
invert the Pipe, you will finde that the
Air will not easily get in at the same hole
through which the Water pass'd.
For in
the sharp end of the Pipe, some Inches
of Water will remain suspended, which
'tis probable would not happen, if the
Air could get in to succeed it, since if the
hole were a little wider, the Water would
immediatly subside.
And though it be
true, that if the Pipe be of the length of
many Inches, a great part of the Wa
ter will run down at the wider Orifice, yet
that seems to happen for some other rea
son, then because the Air succeeds it at
the upper and narrow Orifice, since all the
slender part of the Pipe, and perhaps
some Inches more, will continue full of
Water.
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