May, 1922] 
RAINES 
VEGETATIVE VIGOR OF THE HOST 
223 
Exp. 2. Effect of Removing Endosperm. Plants Inoculated February 28, IQ19 
No. of 
Plant 
Treat- 
ment 
Dry Weight 
of Top 
of Plant 
in Mg. 
Observations 
March 9 
March 11 
March 13 
March 15 
I , . , . 
Endosperm not 
150 
3 pustules 
4 pustules 
4 pustules 
5 pustules 
removed 
on first 
on first 
on first 
on first 
leaf _ 
leaf 
leaf 
leaf 
2 
Endosperm re- 
80 
No infec- 
I pustule 
I pustule 
3 pustules 
moved 
tion 
on second 
on second 
on second 
leaf 
leaf 
leaf 
3 
Endosperm re- 
40 
No infec- 
No infec- 
No infec- 
No infec- 
moved; solution 
tion 
tion 
tion 
tion 
rendered highly 
toxic by large 
excess of Fe2Cl6 
Exp. 3. Effect of Culture Solutions of Varying Nutritive Value. Plants Inoculated March 19, 
1919 
Dry Weight 
Observations 
No. of 
Treat- 
of Top 
Plant 
ment 
of Plant 
1 
in Mg. 
[ March 25 
March 26 
March 27 
March 29 
r uii nutrient solu- 
loo 
iniection 
Infection 
13 pustules 
2 pustules on 
tion J endosperm 
on second 
on second 
on second 
first leaf; i 
cllUJ. Lilli LI 
and third 
leaf ; 4 
pUsLUlC KJIL 
leaves 
leaves 
pustules 
second 
on third 
leaf ; 7 pus- 
leaf 
tules on 
third leaf 
C Ull IlULllCllL bUlU. 
oU 
iNo iniec- 
No infec- 
3 pustules 
5 pustules 
tion 
tion 
tion 
on first 
on first 
leaf; 4 
leaf; 5 
pustules 
pustules 
on second 
on second 
leaf 
leaf 
3 
Full nutrient solu- 
80 
No infec- 
No infec- 
I pustule 
3 pustules 
tion 
tion 
tion 
on first 
on first 
leaf ; 2 
leaf; 4 
pustules 
pustules 
on second 
on second 
leaf; i 
leaf; 2 
pustule 
pustules 
on third 
on third 
leaf 
leaf 
4 
Nutrient solution 
50 
No infec- 
No infec- 
2 pustules 
2 pustules 
rendered toxic 
tion 
tion 
on second 
on second 
with excess of 
leaf 
leaf; i 
FeaCle 
pustule on 
third leaf 
5 
Tap water 
40 
No infec- 
No infec- 
I pustule 
2 pustules 
tion 
tion 
on first 
on first 
leaf; 2 
leaf ; 2 
pustules 
pustules 
on third 
on second 
leaf 
leaf; i 
pustule on 
third leaf 
6 
Distilled water 
20 
No infec- 
No infec- 
No infec- 
2 pustules 
tion 
tion 
tion 
on second 
leaf 
7 
Highly toxic nu- 
20 
No infec- 
No infec- 
No infec- 
I pustule on 
trient solution 
tion 
tion 
tion 
first leaf 
