439 BOTANICAL GAZETTE [JUNE 
entirely free from tannin and gallic acid. With the original 
solution the final filtrate was perfectly clear. The culture liquid 
still retained its dark color. These filtrates were then tested 
with Fehling’s solution for sugar. The first gave noresult. (It 
was necessary to remove the tannin,as the substance reduces 
copper.) The culture fluid gave a strong glucose reaction. These 
results show therefore that Botrytis decomposes commercial 
tannin into glucose, gallic acid, and a dark coloring matter 
whose nature was not further investigated. 
SALICIN. 
The culture fluid containing this substance was tested with 
ferric chloride for saligenin, which was always found to be pres- 
2 ent, though i in small amounts. It has previously been mentioned 
_ that growth upon this substance was very slow. Apparently the 
usual decomposition of salicin into saligenin and glucose is 
. effected by eat ek 
AMYGDALIN. 2 
bas cs mentioned that after the growth of the fungus i: 
upon this substance was under way, an odor of almonds could be : 
i il detected, which was not apparent in the original solution. 
ae icates the o eecton of amygdalin into cee _ - 
1 by the fungus. | . 
: ary. to the present discussion to mai ag 
r study these. individually, though this organism is we! 
ed to” such a study. The method of treating su 
an extract of the BY, celium i is to be used as a basis 
The citatior rk, especial cai 
