under the Influence of Injuries . 
521 
Table VIII. 
Growth of leaf and root after the root was split near the tip. 
Series I. [ a . — Roots split 10 mm., beginning 5 mm. from the tip. 
Zea Mais. ( b. — Control. 
Temperature, 22 0 (constant). 
Series. | 
Average 
original 
length 
of root 
of twelve 
seedlings. 
Average 
original 
length 
of shoot 
of twelve 
seedlings. 
Average 
normal 
rate of 
growth 
of leaf. 
Average 
growth 
of leaf, 
1st period 
after 
injury. 
Average 
growth 
of leaf, 
2nd period 
after 
injury. 
Average 
growth 
of leaf, 
3rd period 
_ after 
injury. 
Average 
total 
growth 
of leaf 
after 
injury. 
Average 
total 
growth 
of root 
after 
injury. 
P. 
24 hrs. 
24 hrs. 
48 hrs. 
72 hrs. 
168 hrs. 
168 hrs. 
I. 
a. 
26 mm. 
10 mm. 
15 mm. 
15 mm. 
55 mm - 
78 mm. 
148 mm. 
166 mm. 
b. 
25 „ 
” „ 
15 „ 
16 „ 
43 „ 
62 ,, 
121 „ 
134 „ 
Table IX. 
Growth of roots and shoots after the roots were injured. 
Series I. ( a . — 10 mm. removed from root-tips. 
Phaseolus < b . — Roots split 10 mm., beginning 5 mm. from the tip. 
multijlorus. ( c. — Control. 
Temperature, 22 0 (constant). 
■a 
V 
C/3 
Average 
original 
length 
of root 
of eleven 
seedlings. 
Average 
original 
length 
of shoot 
of eleven 
seedlings. 
Average 
length of 
secondary 
roots at 
end of 
1st period. 
Average 
length of 
secondary 
roots at 
end of 
2nd period. 
Average 
length of 
secondary 
roots at 
end of 
3rd period. 
Number of 
secondary 
roots at 
end of ex- 
periment. 
Average 
total 
length 
of main 
root. 
Average 
total 
length 
of shoot 
after 
injury. 
P. 
24 hrs. 
24 hrs. 
240 hrs. 
288 hrs. 
288 hrs. 
288 hrs. 
I. 
a. 
38 mm. 
17 mm. 
68 mm. 
260 mm. 
3100mm. 
26 
28 mm. 
225 mm. 
b. 
37 >> 
18 „ 
53 » 
210 }> 
3300 „ 
42 
215 „ 
213 „ 
c. 
35 >j 
„ 
82 „ 
210 „ 
2100 „ 
34 
180 „ 
1 76 ,, 
