130 
Ann C. Halket. 
Plants from BlaUeney (Table III) left overnight in 3 % sodium 
chloride solution, absorbed, on the average, 6-8%, while similar 
plants (Table IV) left in the air till tissues were somewhat limp, 
absorbed, on the average, 36*5% of the water present in the suc¬ 
culent part of the plant at the time of immersion. This increase in 
the amount of absorption would appear to be greatest during the 
first hours of immersion. This follows from an experiment in 
which plants were prepared and left to transpire all night before 
immersion in the salt solution. After 5^ or 6^ hours’ immersion 
they were weighed, then re-immersed and weighed again next 
morning. The values obtained are given in Table VI. 
TABLE VI. 
Plant, locality from which it 
was obtained and date of 
Weight in 
grammes 
of 
succulent 
part of 
plant at 
Dry 
weight in 
grammes 
of 
succulent 
Loss of 
weight in 
grammes 
in dry air 
in approxi- 
Gain of weight in 
grammes after immer¬ 
sion in ?>% NaCI. 
Gain of weight, 
calculated as per¬ 
centage of water in 
succulent part of 
plant at time of 
immersion. 
experiment. 
beginning 
of experi¬ 
ment. 
part of 
plant. 
mately 
22^ hours. 
a 54 hours. 
b 6J hours. 
15| hours. 
1st 
period. 
2nd 
period. 
S. ramosissitna. 
BlaUeney, 3/10/’10 (1) 
„ „ (2) 
,, (3) 
0-7090 
1-1794 
0-0287 
0-0820 
o-ll OS 
0-0798 
0-1216 
C-1190 
0-0718 
a 0-1232 
a 0-0510 
a 0-0378 
0-0568 
0-0278 
0-0188 
20-69% 
5-37% 
7-92% 
7-90% 
2- 78% 
3- 65% 
S. europea, Linn. 
BlaUeney, 3/10/’10 (1) 
„ „ (2) 
,i )> (3) 
0-9890 
0-7596 
0-3270 
0-1872 
0-0630 
0-0270 
0-0826 
0-0662 
0-0238 
b 0-0270 
b 0-0140 
b 0-0060 
0-0180 
0-0030 
-0-0056 
3-30% 
2-22% 
2-17% 
2-13% 
0-46% 
In every case the amount of water absorbed during the first 
period, 5| or 6£ hours, was greater than that absorbed during the 
second longer period, 15|-hours. The amounts gained, calculated 
as percentages of the water present, in the succulent part of the 
plant at the time of immersion, are given in the last two columns. 
These plants did not, with one exception, gain as much in weight 
during the time of absorption as they lost in the period of 
transpiration. 
II. Effect of Immersion of Plants in Liquids for a 
Short Period. 
These experiments are best sub-divided into two groups; one 
in which plants were immersed for short periods of from 1|—3 
hours, the other in which the plants were immersed for a longer 
