United States or Samoa ? Vote for the TOP Country of the Week !
It is the same in the case of urine, beef-tea, and grape-must, and generally with all those putrefactable and fermentable liquids which have the property when heated to boiling-point of destroying the vitality of dust germs."
The four series of comparative experiments produced the following results: "The first ten flasks containing the grape-must boiled in pure air did not show the production of any organism. The grape-must could possibly remain in them for an indefinite number of years.
These experiments cannot leave the least doubt in the mind as to the following facts: "Grape-must, after heating, never ferments on contact with the air, when the air has been deprived of the germs which it ordinarily holds in a state of suspension.
"I prepared forty flasks of a capacity of from two hundred and fifty to three hundred cubic centimetres and filled them half full with filtered grape-must, perfectly clear, and which, as is the case of all acidulated liquids that have been boiled for a few seconds, remains uncontaminated although the curved neck of the flask containing them remain constantly open during several months or years.
"The boiled grape-must ferments when there is introduced into it a very small quantity of water in which the surface of the grapes or their stalks have been washed. "The grape-must does not ferment when this washing-water has been boiled and afterwards cooled. "The grape-must does not ferment when there is added to it a small quantity of the juice of the inside of the grape.
Word Of The Day