Turgor and of Temperature on Growth. 377 
ally consisting of four radicles, was reduced to two by the 
appearance of abnormalities shortly after the transfer to water. 
The roots made the sharp curves characteristic of injury, and 
in aggravated cases, groups of dead cells could be distinguished 
on the concave side. The cause of this lies probably in the 
local inability of the surface-tissues to accommodate them- 
selves to the sudden change of conditions. As the remaining 
radicles agreed very closely in their behaviour, the results are 
here given. 
No measurable contraction was here seen to follow the 
TABLE VI. 
Period. 
Growth per hr. 
Medium. 
Temperature. 
Hours. 
Min. 
35 
*0-25 mm. 
i%KN 0 3 
i8.o°C. 
I 
IO 
0.32 
>> 
,, „ 
18*0 „ 
l 7 
OO 
o-55 
?? 
yy yy 
18.0 „ 
35 
+o -37 
yy 
Water 
l8-0 „ 
2 
30 
0.25 
yy 
„ 
l8-0 „ 
2 
45 
0.31 
yy 
y ? 
17*5 » 
*7 
15 
0.48 
yy 
yy 
17 -° » 
23 
15 
0.68 
yy 
yy 
i 7-5 » 
24 
00 
1*10 
yy 
yy 
18.0 „ 
25 
30 
1*15 
yy 
yy 
18. 
47 
30 
1-02 
yy 
yy 
00 
zj* 
24 
30 
o-8o 
yy 
yy 
18.8 „ 
47 
30 
o»8o 
yy 
» 
00 
Cn 
50 
OO 
o -73 
y y 
9 ) 
t8-o „ 
* Estimated average contraction. 
+ Estimated average elongation. 
transfer to the salt solution. It was occasionally noticed that 
in very strongly growing roots, simply a check of the growth 
occurred. In such cases, the resultant of the growth and of 
the opposing action of the salt was nearly zero. Except 
in this particular, the results resemble those of the preceding 
experiment. The accommodation to water is more readily 
