384 BOTANICAL GAZETTE | DECEMBER 
unusual abundance in these solutions, and may have been an 
indication of injurious action. The fact may also be significant 
that abnormal and distorted mycelium more frequently resulted 
than in ordinary nutrient solution. 
TABLE Ly, 
SULFURIC ACID. 
Gleeosporium *  Macrosporium Penicillium Uromyces 
Grew Failed Grew Failed Grew Failed Grew Failed 
n n n n n ” 
* 6ST I 
3 800 8co 3 800 I Bs 2 6400 2 800 800 
" n n n 
2 2 2 I Saree 
400 400 2 100. | 400 400 49° 
nm n n n n mm 
2 I 
200 4 200 t 2 50 - 200 ! 200 
n n n n " 
I (= 
100 - roo 7 100 100 100 
n 
- 2 
5° 50 
* No, 1338. Poorly. 
T No. 1094. Stunted. 
f No. 1028. Ten in 100 grew poorly. - 
With Macrosporium and Penicillium neither acid prevented 
growth at so: Uromyces was exceedingly variable in its 
behavior with these acids, and the results, as far as they can be 
interpreted, seem to show H,SO, to be a trifle more toxic. 
The killing point of HCl apparently is ,",, while for H,SO, 
tis 44 
Alcohol.—Glceosporium germinated. normally in alcohol of 
semi-normal Strength. Macrosporium even grew in five times 
normal strength, while Penicillium grew in semi-normal, but 
failed in normal. ‘Uromyces grew in five times normal. Stronger 
solutions were not tried, owing to the inability to secure hanging 
drops in stronger solutions. The low toxic power might be 
sought here in volatility, but this seems not to be the cause, as it 
was evident that the Uromyces, Botrytis, and Macrosporium 
