1898 | GERMINATION OF FUNGUS SPORES 387 
Here it first became evident that Uromyces, as the toxic 
solution becomes stronger, does not diminish in vigor of growth, 
but does diminish in the number of germinating spores. 
Copper acetate—Botrytis grew in yyy and failed in 3,%5- 
Macrosporium grew in ,,%,, and failed in 545. Penicillium grew 
in ;¢45 and failed in ,%,. Uromyces was a practical failure in 
=”, or stronger, but some spores grew poorly in ;4,, and, on the 
other hand, were much injured by ;,%,5- There was no growth 
it »%5, which was tried four times. 
TABLE IX. 
COPPER CHLORID. 
Gleeosporium Macrosporium Penicillium Uromyces 
Grew Failed Grew Failed Grew Failed Grew Failed 
nt n A n nt ny 
: 2 pki cceieai — 
12800 6400 - 3200 . 6400 2 yoo . 6400 4 
n 
ss 3200 2 3200 4 1600 
nw 
2 
1600 . 1600 
‘ n 
800 
wt 
2 
400 
*No. 758. Four in 100 grew.— No. 759. One half usual number grew. 
T No. 757. Three in 200 grew. 
Copper chlorid—This was tried upon Gleosporium. In ys 59 
it grew, while in giny it failed. Macrosporium was tried with 
only one strength, ,%,,- It failed to grow. Penicillium grew 
iN yoo and weaker, and failed in ,4,. Uromyces in sxyn BTEWs 
IN s¥y9 three grew very poorly and one failed. This is evidently 
a killing strength. 
Potassium permanganate.—The killing strength of this chem- 
teal was determined with much accuracy, and in experimenta- 
