132 
Ann C. Halket. 
( b .) Plants immersed in 3 % NaCl. 
1st period 
2nd period 
Increase calcu¬ 
lated as percen- 
Plant, locality from which it was 
Weight in 
grammes 
of 
Dry 
weight in 
of immersion. 
of immersion. 
tage of water in 
succulent of 
plant at time of 
grammes 
obtained and date of 
succulent 
part of 
plant. 
of 
immersion. 
experiment. 
succulent 
part of 
Increase 
Time : 
Increase 
Time: 
in weight 
Hours, 
in weight 
Hours, 
plant. 
in 
Mins. 
in 
Mins. 
1st 
2nd 
grammes. 
grammes. 
period. 
period. 
Salicornia, sp. 
From Erquv, 30/9/’09 (1) 
0-2840 
0-0296 
0-0098 
2.0 
0-0022 
1.35 
3-8% 
0-8% 
„ „ ]/10/’09 (F) 
0-2630 
0 0296 
00107 
2.25 
0-0073 
2.22 
4-6% 
30% 
„ „ 30/9/’09 (2) 
0-0950 
0-0110 
00030 
2.0 
00025 
1.30 
3-6% 
2-9% 
„ „ ]/10/’09 (2*) 
0 0890 
0-0110 
0-0100 
2.30 
0 0015 
2.10 
12-8% 
1-7% 
S. ramosissima. 
From Blakeney,5/10/’10 (1) 
0-6540 
0 0668 
0-0164 
2.10 
— 
— 
2-8% 
— 
„ „ „ (2) 
0-6238 
0-0565 
0-0268 
2.50 
— 
— 
4-7% 
-- 
1! )) >t (3) 
0-4440 
0-0432 
00130 
2.50 
— 
— 
3-2% 
— 
S. envopea, Linn. 
From Blakeney,5/10/’10 (1) 
0-3636 
0 0322 
0-0126 
2.50 
— 
— 
3-8% 
- - 
„ „ „ (2) 
0-3542 
0-0310 
00166 
2.33 
— 
— 
5-1% 
— 
„ „ „ (3) 
0-3940 
0-0266 
0-0104 
2.35 
— 
1 
2-8% 
— 
(B). Time of immersion divided into hourly periods. 
It was hoped in these experiments to find out what was the 
relationship that existed between the amount of water absorbed 
and the time of immersion. The plants were therefore suspended 
in the liquids, taken out, dried and weighed every hour. In some 
cases a longer interval elapsed, but in every case the exact time of 
immersion was taken. After weighing, the plants were replaced 
in liquids as soon as possible. From the experiments given above, 
Tables VI and VII, in which the amount absorbed in the first few 
hours was greater than in subsequent hours, it was thought 
possible that the amount of water absorbed diminished with the time 
of immersion. The results obtained did not bear out this assumption. 
In the plants experimented with, the amount absorbed each hour 
was small and varied from hour to hour ; though, in some cases, it 
was nearly equal for consecutive hours. As these plants had been 
kept in the laboratory for about ten days, the fact that the amount 
of water absorbed was small may have been due to their decreased 
vitality, though the plants looked as healthy as ever. Certain 
other plants (2) immersed in 3% sodium chloride solution decreased 
in weight, but these were not sufficient to vitiate in any way the 
other results. The figures obtained are given in Table VIII. 
