For he proved that the various changes occurring in the several processes of fermentation - as, for example, in the vinous, where alcohol is the chief product; in the acetous, where vinegar appears; and in the lactic, where milk turns sour - are invariably due to the presence and' growth of minute organisms called ferments.
It is strained, deprived of its moisture, and receives an admixture of gamboge, cinnabar, acetous protoxide or some other coloring matter.