tinder the Influence of Injuries. 523 
Series I, Table XI, shows that seedlings may be shocked 
for one hour with strong ether without producing any marked 
effect upon the rate of growth of the leaves. If the shock 
lasted one and a half hours, as in Series II, an acceleration 
was noticeable, beginning after the first twenty-four hours 
Table XI. 
Growth of leaves after shocking with ether. 
Series I. 1 a . — i hour in atmosphere of ether (5 cc. ether in 200 cc. water). 
Avena. | b. — Control. 
Series II. i a . — if hours in atmosphere of ether (5 cc. ether in 200 cc. water). 
Avena. \ b. — Control. 
Series III. i a . — 2 hours in atmosphere of ether (5 cc. ether in 200 cc. water). 
Avena . ( b. — Control. 
Temperature, 23 0 (constant). 
Series. 
Average 
original 
length of 
leaf of 
twelve 
seedlings. 
Average 
normal 
rate of 
growth 
of leaves. 
Average 
growth of 
leaves, 
1st period 
after 
shocking. 
Average 
growth of 
leaves, 
2nd period 
after 
shocking. 
Average 
growth of 
leaves, 
3rd period 
after 
shocking. 
Average 
growth of 
leaves, 
4th period 
. after 
shocking. 
Average 
total 
growth of 
leaves 
after 
shocking. 
P. 
24 hrs. 
12 hrs. 
12 hrs. 
24 hrs. 
72 hrs. 
120 hrs. 
I. 
a. 
25 mm. 
21 mm. 
14 mm. 
14 mm. 
22 mm. 
29 mm. 
79 mm. 
b. 
26 ,, 
22 „ 
17 „ 
15 „ 
25 » 
25 » 
82 „ 
P. 
24 hrs. 
24 hrs. 
24 hrs. 
24 hrs. 
48 hrs; 
120 hrs. 
II. 
a. 
33 mm. 
27 mm. 
30 mm. 
30 mm. 
25 mm. 
11 mm. 
96 mm. 
b. 
35 »> 
25 „ 
30 „ 
25 » 
16 ,, 
2 „ 
73 „ 
P. 
24 hrs. 
12 hrs. 
36 hrs. 
24 hrs. 
48 hrs. 
1 20 hrs* 
III. 
a. 
26 mm. 
29 mm. 
15 mm. 
32 mm. 
20 mm. 
7 mm. 
74 mm. 
b. 
28 „ 
28 „ 
21 „ 
46 „ 
22 ,, 
7 „ 
96 ,, 
and continuing four days, i. e. as long as the leaves of the 
seedlings grew. If the shock was allowed to continue for 
two hours, a marked retardation during the first forty-eight 
hours was observed, followed by a return to the normal rate 
of growth, but without acceleration (Series III). A shock 
N n 
