Having thus accurately determined the nature and quantity of the constituent elements of the materials submitted to fermentation, we have next to examine the products resulting from that process. For this purpose, I placed the above 510 libs. of fermentable liquor in a proper[26] apparatus, by means of which I could accurately determine the quantity and quality of gas disengaged during the fermentation, and 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 deg. (65.75 deg.) to 18 deg. (72.5 deg.) 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