126 
Ann C. Halket. 
immersion the plants were suspended upside down in the liquids, 
care being taken that the level of the liquid should reach only half 
way up the lowest succulent internode. This precaution was taken 
so that increase of weight should be due only to absorption by 
living cells of the succulent parts of the plant. At the conclusion 
of any experiment the succulent part of the plant was cut off and 
the non-succulent part, etc. weighed. In this way the weights of 
the succulent part, before and after immersion, were obtained. In 
the later experiments the succulent parts were dried at 100°C and 
their dry weights found. 
Preliminary experiments. In the preliminary experiments small 
plants were fixed, in the usual way, by corks into small bottles with 
a certain amount of soil. They were immersed in the liquids for a 
short time each day on three successive days ; the rest of the day 
they were kept under a large bell-jar in the laboratory. The figures 
are given in the following Table:— 
TABLE II. 
Details of Plant. 
Increase 
of weight 
in 
grammes 
after 
hours 
immersion 
Decrease 
of weight 
in 
gram mes 
in air in 
19J hours. 
Increase 
of weight 
in 
grammes 
after 4J 
hours 
immersion 
Decrease 
of weight 
in 
grammes 
in air in 
20J hours. 
Increase of 
weight in 
grammes 
after 
approxi¬ 
mately 4 
hours 
immersion. 
Salicornia, from Erquy, Sept., 
1907, immersed in 3% NaCl. 
0-030 
0-086 
0-057 
0-096 
0-043 
Increase 
after 2 
hours 
immersion 
Decrease 
after 22 
hours in 
air. 
Increase 
after If 
hours 
immersion 
Decrease 
after 20J 
hours in 
air. 
Increase 
after 
3 hours 
immersion. 
Salicornia, from Tilbury, Nov., 
1907, immersed in tap water (1) 
(2) 
(3) 
0-045 
0-029 
0-030 
0-132 
0-199 
0-306 
0-050 
0-038 
0-026 
0-188 
0-195 
0-095 
o-ioo 
It will be seen from these figures that each day the plants 
gained in weight during their period of immersion, though the gain 
in weight was less than the loss of weight during the rest of the 
day. Transpiration was not restricted by absence of root absorption, 
