60 
TENTH REPORT. 
III. C 11 SO 4 . 
128 
256 
512 
1024 
2048 
Macrosporium 
0 
s 
G 
G 
Ustila 0 
s 
G 
G 
Glomerella 
0 
0 
S 
G 
IV. NaOH. 
8 
16 
32 
64 
Macrosporium 
0 
G 
G 
G 
Puccinia 
s 
G 
G 
G 
Ustilago 
0 
S 
G 
G 
V. KOH. 
8 
12 
16 
32 
Macrosporium 
0 
s 
G 
s 
G 
Puccinia 
0 
O 
G 
Ustilago 
O 
0 
s 
G 
VI. BORDEAUX MIXTURE (WHOLE.) 
2 
1 
. 4 
1 
i 
1-16 
Ustilago 
s 
G 
s 
0 
O 
G 
G 
Macrosporium 
G 
s 
(?) O 
O 
s 
Glomerella 
0 
0 
0 
O 
VII. BORDEAUX (SUPERNATANT LIQUID ALONE.) 
2 
1 
i 
1 
4 
i 
1-16 
Ustilago 
(?) G 
G 
G 
G 
G 
G 
Macrosporium 
s 
G 
G 
G 
G 
G 
Glomerella 
0 
S 
G 
S 
0 
0 
From the results set forth in table I., and table II., we find HOI more 
toxic to Macrosporium than H2SO4, but the reverse appears to be the case 
with TJstilago. It is quite clear also that the different fungi differ among 
themselves materially in resisting power. In table II., notice Ustilago 
germinating in HC1 at a strength of n/16, while Glomerella requires a dilu- 
tion of n/128. 
In looking at table III. it is quite worthy of remarking the high concen- 
tration of solution of CuS0 4 , that these fungi will resist, especially Ustilago 
and Macrosporium. This remarkable resisting power to toxic solutions 
becomes very apparent when we compare radicles of seedlings with these 
fungus hyphae. Corn radicles are just able to withstand a concentration 
