Micrographia: Some Physiological Descriptions of Minute Bodies Made by Magnifying Glasses with Observations and Inquiries ThereuponHooke, Robert
History
Micrographia: Some Physiological Descriptions of Minute Bodies Made by Magnifying Glasses with Observations and Inquiries Thereupon
Hooke, Robert
Magnifying glasses -- Early works to 1800; Microscopy -- Early works to 1800; Natural history -- Pre-Linnean works
thrust to _G_ and _D_ to _H_; the _globular_ Figure by this means also will
be made an _Elliptico-spherical_. Next if a fluid be included _partly_ with
one, and _partly_ with another fluid, it will be found to be shaped
_diversly_, according to the proportion of the _gravity_ and _incongruity_
of the 3 _fluids_ one to another: As in the _second Figure_, let the upper
_MMM_ be _Air_, the middle _LMNO_ be common _Oyl_, the lower _OOO_ be
_Water_, the _Oyl_ will be form’d, not into a _spherical_ Figure, such as
is represented by the _pricked Line_, but into such a Figure as LMNO, whose
side LMN will be of a flatter _Elliptical_ Figure, by reason of the great
disproportion between the _Gravity_ of _Oyl_ and _Air_, and the side LOM of
a rounder, because of the smaller difference between the weight of _Oyl_
and _Water_. Lastly, The _globular_ Figure will be changed, if the
_ambient_ be partly _fluid_ and partly _solid_. And here the termination of
the incompassed _fluid_ towards the incompassing is shap’d according to the
proportion of the congruity or incongruity of the _fluids_ to the _solids_,
and of the gravity and incongruity of the _fluids_ one to another. As
suppose the subjacent _medium_ that hinders an included fluids descent, be
a _solid_, as let KI, in the _fourth Figure_, represent the smooth
superficies of a _Table_; EGFH, a parcel of _running Mercury_; the side GFH
will be more flatted, according to the proportion of the incongruity of the
_Mercury_ and _Air_ to the _Wood_, and of the _gravity_ of _Mercury_ and
_Air_ one to another; The side GEH will likewise be a little more deprest
by reason the subjacent parts are now at rest, which were before in motion.
Public-domain text, read in full here on John Shaqi.
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