492 Experiments €8 Obfervations 
trials, avery ftrong fermentation took place 
before forty-eight hours were expired; and when 
a part of the peas thus treated was expofed to 
the air, at the end of two days, none of 
them fprouted.—In the fecond, they were 
not. fo foon injured; for a few of thofe which 
were tried on the third day vegetated. ‘Thus 
it appears, that'an increafe of temperature proves 
injurious to feeds fecluded from the air, by 
promoting putrefadion in them, and pb 
deftroying their vegetative power. 
Experiment XI. Seeds properly moiftened 
emit carbonated hydrogene mixed with carbonic acid, 
when furrrounded with azote, as freely as others 
of the fame kind do when immerfed in water ; 
for if wet peas or barley be confined in’ a 
known quantity of azote, as in Experrment IX. 
the volume of gas will remain the fame for a 
few days, but will begin to increafe more or 
lefs rapidly at the end of an indeterminate 
time ; which is longer when the temperature 
is lower, and the contrary, Hence it is evi- 
dent, that a portion of frefh gas is afforded by 
the materials inclofed with that contained in 
the jar; and thus is the bulk of the given quan- 
tity enlarged. Moreover, if a bottle charged 
as in Experiment VIII. be left clofely ftopped, 
for twelve or fourteen days, in a moderate 
temperature, the common air contained in it 
; will 
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