| Boyle, Robert New experiments physico-mechanicall, touching the spring of the air and its effects 1660 |
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263
were desirous to try whether or no the
pressure of the Air might reasonably be
suppos'd to have either the principal, or at
least a considerable Interest in the raising
of those Liquors.
But because we found
that we could not yet so evacuate our Re
ceiver, but that the remaining Air,
though but little in comparison of the
exhausted, would be able to impell the
the Water to a greater height then is
usual in ordinary Filtrations: we resolved,
instead of a List of Cotton, or the like
Filtre, to make use of a Siphon of Glass,
delineated in the third Figure, consist
ing of three pieces, two straight, and
the third crooked to joyn them toge
ther; whose Junctures were diligently
clos'd, that no Air might finde entrance
at them.
One of the Legs of this Si
phon was (as it should be) somewhat
longer then the other, and was pervious
at the bottom of it onely, by a hole al
most as slender as a hair, that the
Water might but very leasurely drop
out of it, lest it should all run out
before the Experiment were compleat
ed.
The other and shorter Leg of
the Siphon was quite open at the end,
and of the same widenesse with the
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