could even weigh every one of the products separately, at any period of
the process I judged proper. An hour or two after the substances are
mixed together, especially if they are kept in a temperature of from 15
(65.75 ) to 18 (72.5 ) of the thermometer, the first marks of
fermentation commence; the liquor turns thick and frothy, little
globules of air are disengaged, which rise and burst at the surface; the
quantity of these globules quickly increases, and there is a rapid and
abundant production of very pure carbonic acid, accompanied with a scum,
which is the yeast separating from the mixture. After some days, less or
more according to the degree of heat, the intestine motion and
disengagement of gas diminish; but these do not cease entirely, nor is
the fermentation completed for a considerable time. During the process,
35 libs. 5 oz. 4 gros 19 grs. of dry carbonic acid are
disengaged, which carry alongst with them 13 libs. 14 oz. 5 gros
of water. There remains in the vessel 460 libs. 11 oz. 6 gros 53
grs. of vinous liquor, slightly acidulous. This is at first muddy, but
clears of itself, and deposits a portion of yeast. When we separately
analise all these substances, which is effected by very troublesome
processes, we have the results as given in the following Tables. This
process, with all the subordinate calculations and analyses, will be
detailed at large in the Memoirs of the Academy.
TABLE IV. _Product of Fermentation._
libs. oz. gros grs.
35 libs. 5 oz. 4 gros 19 grs. { Oxygen 25 7 1 34
of carbonic acid, composed of { Charcoal 9 14 2 57
408 libs. 15 oz. 5 gros 14 grs. { Oxygen 347 10 0 59
of water, composed of { Hydrogen 61 5 4 27
{ Oxygen, combined
{ with hydrogen 31 6 1 64
{ Hydrogen, combined
57 libs. 11 oz. 1 gros 58 grs. { with oxygen 5 8 5 3
of dry alkohol, composed of { Hydrogen, combined
{ with charcoal 4 0 5 0
{ Charcoal, combined
{ with hydrogen 16 11 5 63
103