May 16, i 9 « Glucose as a Source of Carbon for Storage-Rot Fungi 197 
shows some very interesting results. In discussing these results it must 
be borne in mind that all the glucose which has disappeared from the 
solution has not been actually utilized in the formation of the fungous 
material. Certain compounds, such as alcohol, organic acids, and carbon 
dioxid probably were formed. 
Table IV .—Total amount of glucose reduced 
[Expressed in grams] 
Series 
No. 
Percentage 
of dextrose 
by weight. 
Solution. 
Fusarium 
acumi¬ 
natum. 
Diplodia 
tubericola. 
Rhizopus 
tritici. 
Mucor 
racemosus. 
I 
f Control. 
0 
O 
O 
O 
O 
[ Inoculated. 
O 
O 
O 
O 
II 
fControl. .... 
IO 
\ Inoculated. 
1.78 
12 - 45 
I- 73 
6.30 
III 
f Control .. 
20 
X Inoculated. 
i -73 
6. 89 
2. 72 
6.38 
IV 
f Control. 
30 
X Inoculated. 
1. 81 
7.04 
3-34 
5. 18 
V 
f Control . 
40 
[Inoculated. 
.81 
1.67 
4. 70 
2.99 
VI 
j Control . 
50 
[Inoculated. 
. 06 
0 
3 - 3 1 
.09 
VII 
60 
f Control . 
[Inoculated. 
0 
0 
0 
O 
Series 
No. 
Percentage 
of dextrose 
by weight. 
Solution. 
Sclerotium 
bataticola. 
Penicillium 
sp. 
Botrytis 
cinerea. 
Sphaero- 
nema Jim - 
briatum. 
f Control. 
O 
O 
O 
O 
I 
O 
[Inoculated.. 
O 
O 
O 
O 
II 
J Control. 
IO 
[ Inoculated.. 
II.30 
9. 18 
O.77 
III 
f Control . 
20 
[Inoculated. . . .. 
8. 51 
5 - 47 
I.85 
O 
IV 
( Control. 
30 
[Inoculated. 
5. l8 
6. 90 
4- 65 
f Control. 
V 
40 
[Inoculated. 
I. 76 
9. 60 
•25 
O 
VI 
f Control. 
50 
[Inoculated. 
.40 
5 - r 5 
0 
O 
VII 
60 
f Control. 
[ Inoculated. 
O 
1. 76 
In concentrations of approximately io per cent, four organisms, 
Diplodia tubericola, Sclerotium bataticola, Penicillium sp., and Mucor 
racemosus, have reduced a considerable quantity of the total amount of 
glucose originally present. All these fungi utilize a larger amount of sugar 
at a strength of io per cent than at any higher concentration, except 
Penicillium sp., which reduced slightly more in the 40 per cent solution. 
Penicillium alone grew and consumed some glucose in an approximately 
58 per cent solution. With these organisms Rhizopus tritici and Botrytis 
cinerea should especially be compared. The two latter fungi used a 
comparatively small amount of sugar at any concentration tried. It is, 
furthermore, significant that they used the lesser amount at the lower 
concentration, the quantity consumed increasing with the increase of 
