yo 8 Fritsch and Haines .— The Moisture-relations 
unaffected from the very first. In Experiment XXXV all the surviving 
cells had small granules, whilst the moribund unaffected cells were dis¬ 
tinguished by the possession of coarse irregular granules. 
In concluding this section attention may be drawn to the most impor¬ 
tant conclusion reached, viz. that the cells surviving prolonged treatment 
with hypertonic solutions are either those which are impermeable to the 
solution as implied by the persistence of plasmolysis or more rarely such as 
are possessed of a mechanism inhibiting the occurrence of plasmolysis as 
implied by their remaining unaffected. The close correspondence between 
the reaction to drought and the reaction to hypertonic solutions would seem 
to make it probable that the surviving cells are of the same kind in both 
cases, a matter which is further considered in the next section (cf. p. 717). 
E. Recovery from the Drought Condition and the State of 
the Material during Drought. 
In several cases, after the material had been subjected to more or less 
intense drought, it was placed either in saturated air or was actually soaked 
with water. 
Table XIII. 
Comparison of plasmolysis in drought material of various terrestrial forms 
and in the same material some time after exposure to moisture. 
(The first line in each case shows the drought condition, 1 the second that after exposure 
to moisture.) 
Material. 
Expt. 
Cells 
Strength 
Strongly 
Slightly 
Unaffected. 
Duration of 
exposure to 
A r o. 
counted. 
of sol. 
plasmolysed. plasmolysed. 
moisture 
Zygogonium 
V 
1,839 
% 
5 
% 
O-I 
% 
7-2 
% 
9 2 ‘7 
(days'). 
,, 
V 
7 X 5 
5 
— 
Si *3 
18.7 
3 
>> 
XII 
926 
5 
— 
5 * 1 
94'9 
yy 
827 
5 
1*2 
22-5 
7 6 ’3 
3 
11 
XVI 
841 
5 
°-5 
i 5 -i 
84*4 
11 
11 
1,042 
5 
IT 
51-2 
47*7 
13 
11 
III 
990 
3 
— 
2-6 
97*4 
11 
960 
3 
0-4 
68-8 
3 °'S 
12 
Hormidium 
XIV 
1,400 
5 
12-9 
87-1 
,, 
yy 
503 
5 
— 
137 
86*3 
2 
Prasiola 
XXVII 
9°5 
20 
— 
28-3 
7 1 *7 
,, 
11 
921 
20 
45 '8 
2 7-3 
26-9 
21 
Protonema 
XV 
^55 
5 
2*9 
83-8 
i 3*3 
,, 
y y 
93 i 
5 
3 2 *3 
37*6 
30-1 
x 4 
,, 
XXXIV 2 
887 
5 
62*3 
47*7 
it 
yy 
1,105 
5 
80*7 
i 4*3 
5 '° 
1 
a 
yy 
640 
5 
— 
34 ' 2 
65 8 
a 
yy 
565 
5 
CO 
^0 
28.8 
2.5 
1 
1 Regarding the nature and duration of the previous drought, cf. Table V. 
In Experiment XXXI\ patches of soil with protonema were removed from the desiccator on 
successive days and soaked with water. 
