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Updated: June 28, 2025
But, speaking of them as principles capable of vegetation, these germs may or may not expand into whole forests of evil, according to the accidents of coming events, whether fitted to tranquillize our billowy aspects of society; or, on the other hand, largely to fertilize the many occasions of agitation, which political fermentations are too sure to throw off.
The Sciences gain by mutual support. When, as the result of my first communications on the fermentations in 1857-1858, it appeared that the ferments, properly so-called, are living beings, that the germs of microscopic organisms abound in the surface of all objects, in the air and in water; that the theory of spontaneous generation is chimerical; that wines, beer, vinegar, the blood, urine and all the fluids of the body undergo none of their usual changes in pure air, both Medicine and Surgery received fresh stimulation.
The genius of the English people is perhaps incompatible with a state of perfect tranquillity; if it was not ruffled by foreign provocations, or agitated by unpopular measures of domestic administration, it will undergo temporary fermentations from the turbulent ingredients inherent in its own constitution Tumults are excited, and faction kindled into rage and inveteracy, by incidents of the most frivolous nature.
If, for example, we find alcohol among the products of a fermentation, or even alcohol and carbonic acid gas together, this does not prove that the ferment must be an alcoholic ferment, belonging to alcoholic fermentations, in the strict sense of the term. Nor, again, does the mere presence of lactic acid necessarily imply the presence of lactic ferment.
This was doubtless for the two following reasons: first, in consequence of the accidental production of secondary and diseased fermentations which frequently prevent the propagation of alcoholic ferment; and, secondly, in consequence of the original exhausted condition of the yeast employed.
Before leaving this branch of the subject it is necessary to notice some of the troublesome fermentations which are ever interfering with our industries, requiring special methods, or, indeed, sometimes developing special industries to meet them. As agents of decomposition, bacteria will of course be a trouble whenever they get into material which it is desired to preserve.
They affected mutual respect, even when most offensive; but this repressed animosity only corroded their hearts more deeply, and it burst forth occasionally beneath the politeness of their language, like death beneath the glance of steel. All these fermentations of division, rivalry, and resentment, boiled over in the April sittings.
Even in the treatment of foreign subjects one still remains in France and Paris, quite absorbed in all the wishes, necessities, conflicts, and fermentations of the present day." "Béranger also," I threw in experimentally, "has only expressed the situation of the great metropolis, and his own interior."
The whole of the great fermentative industries, in which are invested hundreds of millions of dollars, is based upon chemical decompositions produced by microscopic plants. In the great part of commercial fermentations alcohol is the product desired, and alcohol, though it is sometimes produced by bacteria, is in commercial quantities produced only by yeasts.
The tobacco, after being ground and mixed with certain ingredients, is allowed to undergo a fermentation which lasts for weeks, and indeed for months. In the different methods of preparing snuff the fermentations take place in different ways, and sometimes the tobacco is subjected to two or three different fermentative actions.
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