428 BOTANICAL GAZETTE [JUNE 
%: Amygdalin—In a 2 per cent. solution of amygdalin growth 
was slowand only fair. The odor of almonds became noticeable 
in the culture after some development had taken place. 
Brucin and strychnin.—I1n 1 per cent. solutions of these poi- 
sonous substances growth was extremely feeble and practically 
nothing. 
Quinin und thein.—In 2 per cent. solutions of these substances 
no growth took place. 
It appears, therefore, from the above results that Botrytis 
cinerea is able to satisfy its carbon requirements from the follow- 
ing substances: sugars in general, dextrin, cellulose, glycerin, 
gum arabic, vegetable oils, tartaric and malic acids, asparagin, 
and several glucosides, as tannin, salicin, and amygdalin. The 
effect of the growth of the fungus upon these substances may 
now be considered. In studying this point the method used was 
to reserve a portion of each solution tested, which could 
later be compared with the remainder of the solution, upo? 
which Botrytis had developed. 
- : SUGARS. 
No extensive study was made of the complicated pat 
mations of the various sugars which take place under — 
_ cumstances as these. The Fehling test showed that in all cases 
2 reduction, so that in the case of cane sugar inversion 
place. It was found that oxalic acid was produced in 
is 
a aa 
I eT a SE Se a TE a ES a eee Oe en a ee a 
“ _ the solution upon which Botrytis had been growing gave a strong ‘ “A 
consider- 
