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Hooke, Robert, 1635-1703

"Micrographia Some Physiological Descriptions of Minute Bodies Made by Magnifying Glasses with Observations and Inquiries Thereupon"

And lastly, since those degrees that are
requisite to press it in, are thereby taken off from the _Air_ within, and
the _Air_ within left with so many degrees of pressure less then the _Air_
without; it will follow, that the _Air_ in the less _Tube_ or _pipe_, will
have less pressure against the superficies of the _water_ therein, then the
_Air_ in the bigger: which was the minor Proposition to be proved.
The Conclusion therefore will necessarily follow, _viz._ That _this unequal
pressure of the Air caused by its ingress into unequal holes, is a cause
sufficient to produce this effect, without the help of any other
concurrent_; therefore is probably the principal (if not the only) cause of
these _Phaenomena_.
This therefore being thus explained, there will be divers _Phaenomena_
explicable thereby, as, the rising of _Liquors_ in a _Filtre_, the rising
of _Spirit of Wine_, _Oyl_, _melted Tallow_, &c. in the _Week_ of a _Lamp_,
(though made of small _Wire_, _Threeds_ of _Asbestus_, _Strings_ of
_Glass_, or the like) the rising of _Liquors_ in a _Spunge_, piece of
_Bread_, _Sand_, &c. perhaps also the ascending of the _Sap_ in _Trees_ and
_Plants_, through their small, and some of them _imperceptible pores_, (of
which I have said more, on another occasion) at least the passing of it out
of the earth into their roots. And indeed upon the consideration of this
Principle, multitudes of other uses of it occurr'd to me, which I have not
yet so well examined and digested as to propound for _Axioms_, but only as
_Queries_ and _Conjectures_ which may serve as _hints_ toward some further
_discoveries_.


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