Experiments on Absorption of Salt-Marsh Plants. 135 
than that absorbed in the short periods. This is contrary to the 
results given in Table VI, but the conditions differed in that the 
succulent tissues were turgid here and not turgid in that 
experiment. 
Control plants were left in air and weighed at short intervals. 
The decrease in weight due to transpiration was, on the whole, 
rather less than the average increase of weight after immersion in 
water for the same time, though at first the loss in weight was 
greater than the gain. The figures are given in Table IX, and 
the decrease has been calculated as a percentage of the water 
present in the succulent part of the plant at the beginning of the 
experiment. 
TABLE IX. 
Locality from which plants were 
obtained and date of 
experiment. 
Weight of 
succulent 
part of 
plant. 
Dry 
weight of 
succulent 
part of 
plant. 
Time : 
Hours, 
Mins. 
Decrease 
in weight 
of plant in 
air. 
Decrease 
calculated 
as a percen¬ 
tage of 
water in 
succulent 
part of plant 
at begin¬ 
ning of 
experiment. 
Salicornta, sp. 
Blakeney, 27/7/’ 10 (1) 
03649 
0-0274 
1.0 
0-0093 
2-76% 
2.6 
0-0114 
1.22 
0-0054 
1.6 
0-0064 
„ „ (2) 
0-2200 
0-0187 
1.0 
0-0032 
1-59% 
2.0 
0-0035 
1.22 
0-0015 
1.6 
0-0016 
,, H (3) 
0-1982 
0-0151 
1.0 
0-0006 
•33% 
2.0 
0-0019 
1.25 
0 0017 
1.5 
0-0016 
An attempt has been made to represent graphically the 
relations between the amount of water absorbed and the time of 
immersion in water and in the salt solution; also between the 
amount of water lost in air through transpiration and the time 
occupied. 
In these “curves” the values for the abscissae were obtained 
by adding together the values obtained for the different plants 
given in Tables VIII and IX, and treating the totals as one result. 
The gain or loss of weight was then calculated as a percentage of 
the water present at the beginning of the experiment. These 
percentages are plotted against the time. 
