260 -Onthe Fermentation and 
tity of my liquors after fermentation. On reflec- 
tion it would readily occur, that there would be a 
diminution of bulk in that which was fermented in 
the open vessel; but it was so great, that I at first 
suspected an error had been committed in dividing 
the liquors: however, from repeated observation, 
the difference was so evident, that I made the two 
following experiments more accurately to determine 
the fact. 
I took eleven quarts, three ounces, and a half of 
wort, to which I added four ounces of yest, and 
fermented it in the close vessel for twelve days, at 
the end of which time it had lost eight ounces by 
measure. 
An equal quantity of wort and yest was ferment- 
ed in an open, vessel for the same length of time, 
and exactly in the same temperature. On measur- 
ing the second, I found a diminution of forty ounces. 
To determine with certainty whether the liquors 
remaining in each vessel were equally good, I sepa- 
rately distilled the two, leaving out thirty-two ounces 
of the latter, (which was the difference in quantity) 
and the spirit produced from each was exactly alike. 
From the two foregoing facts our information is 
still more complete, as we not only observe the 
great saving in the liquor by close fermentation, but 
we also see that a diminution of eight ounces had 
taken place in the close vessel, and we have good 
grounds for supposing that it is an actual diminution 
