Buffon's Natural History, Volume 03 (of 10): Containing a Theory of the Earth, a General History of Man, of the Brute Creation, and of Vegetables, Minerals, &c. &c.Buffon, Georges Louis Leclerc, comte de
History
Buffon's Natural History, Volume 03 (of 10): Containing a Theory of the Earth, a General History of Man, of the Brute Creation, and of Vegetables, Minerals, &c. &c.
Buffon, Georges Louis Leclerc, comte de
Natural history
IX. Between the tenth and eleventh hour the liquor became extremely
fluid, and all the globules appeared to proceed in ranks from one and
the same side; (_fig. 5._) they passed over the table of the microscope
in less than four seconds; they were ranged seven or eight in front,
and moved on successively, as troops march in files. I observed this
singular instance for more than five minutes; and as their course
did not finish, I was desirous of finding the source: and, having
gently moved my glass, I perceived that all these moving globules came
from a kind of mucilage, (_fig. 6._) where the filamentary net-work
continually produced them more abundant and much quicker than the
filaments had ten hours before. There was still a remarkable difference
between these moving bodies produced in the thick liquor, and those
produced when the liquor became more fluid; these last had no thread
behind them, their motion was quicker, and they went in flocks like
sheep. I observed the mucilage from whence they issued for some time,
and perceived it diminished, and was successively converted into
moving globules, till the diminution of more than half the bulk; after
which, the liquor being too dry, this mucilage became obscure in its
middle, and all the environs were divided by the small threads which
appeared to be formed from the bodies of these moving globules which
were destroyed as it dried up, not in one single mass, but in long
threads, regularly disposed, with quadrangular intervals, forming a
net-work, very like to a cobweb, on which the moisture hung in an
infinite number of globules.
X. I perceived by the first experiment, that these little moving
bodies change their form, and I thought they in general diminished,
but of that I was not certain. In this last observation, at the
twelfth and thirteenth hour I observed it more distinctly; at the same
time remarking that though diminished considerably in size, yet they
increased in specific gravity; especially when their motion was nearly
finished, which generally happened all at once and they sunk to the
bottom, forming a sediment of an ash-colour, plainly perceptible to the
naked eye, and which appeared through the microscope to be composed of
globules adherent to on another, sometimes by threads, and at others
in knots, but always in a regular manner.
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