under the Influence of Injuries . 527 
seconds, and the stalks were watched closely for the first 
few seconds after treating. After the rate of growth of 
a stalk had recovered from the effect of cutting one mycelium, 
Table XIV. 
Growth of sporangium -stalks of Phycomyces after other sporangium-stalks 
or mycelia were cut off or treated with KNO a . 
Temperature, 17-20°. 
Observa- 
tion 
periods. 
Growth of 
sp.-stalk 
after 
mycelia 
cut once. 
Growth of 
sp.-stalk 
after 
mycelia 
cut twice. 
Growth of 
sp.-stalk 
after an- 
other sp.- 
stalk was 
cut once. 
Growth of 
sp.-stalk 
after an- 
other sp.- 
stalk was 
cut three 
times. 
Helioptro- 
pism of 
sp. -stalk 
after 
mycelia 
were cut 
once. 
Growth of 
sp.-stalk 
after 
KNOs 
applied to 
mycelia. 
10 min. 
Spaces. 
II 
Spaces. 
7 
Spaces. 
20 
Spaces. 
20 
Spaces. 
3 
Spaces. 
8 
„ 
12 
7 
20 
22 
3 
8 
5 ) 
12* 
8* 
21* 
23* 
3 * 
9* 
» 
3 
3 
1 
1 
1 
5 
>> 
4 
4 
8 
10 
1 
2 
5 
6 
15 
14 
1 
0 
*> 
7 
8* 
20 
18* 
i? 
0 
» 
10 
3 
20 
18 
2 
of 
11 
5 
22 
20* 
3 
0 
V 
13 
8 
25 
22 
3 
0 
» 
M 
9 
26 
22 
3 
5 ) 
15 
9 
26 
25 
4 
3 
One space = -^ of a millimeter. 
N shows normal growth for three periods. 
* Indicates the time of injury. 
f In the last column indicates that the 5% KN 0 3 solution was gradually 
displaced by water. 
the rate of growth was again reduced to the same extent 
if another mycelium of the same size was cut, the period 
of recovery being shorter usually in the second case 
