FLASK A, WITHOUT AIR.
January 21st.—Fermentation commenced; a little frothy liquid issued from the escape tube and covered the mercury.
The following days, fermentation was active. Examining the yeast mixed with the froth that was expelled into the mercury by the evolution of carbonic acid gas, we find that it was very fine, young, and actively budding.
February 3rd.—Fermentation still continued, showing itself by a number of little bubbles rising from the bottom of the liquid, which had settled bright. The yeast was at the bottom in the form of a deposit.
February 7th.—Fermentation still continued, but very languidly.
February 9th.—A very languid fermentation still went on, discernible in little bubbles rising from the bottom of the flask.
FLASK B, WITH AIR.
January 21st.—A sensible development of yeast.
The following days, fermentation was active, and there was an abundant froth on the surface of the liquid.
February 1st.—All symptoms of fermentation had ceased.