150 Halket .— The Effect of Salt on the Growth of Salicornia . 
chosen as far as possible of the same size, and six were placed in each 
culture jar. The experiments were begun about the end of April. 
The growth of the plants in the various solutions was compared by 
measurements of the lengths of the epicotyls. These measurements were 
begun on May 8 and were continued till the beginning of July. Here, as in 
the previous experiments, the results obtained for Salicornia differed from 
those obtained for Snaeda. It was found that the increase in length of the 
plants of Suaeda was approximately equal in the nutritive solution without 
the addition of sodium chloride and in that to which 1 % of this salt had 
been added, the total growth per plant in the first case being 112 mm. and 
in the second no*2 mm. In the other jars the growth of the plants 
diminished as the amount of salt increased. 
Plants of the two species of Salicornia grew much better in the 
presence of sodium chloride than in its absence. Salicornia ramosissima 
grew to approximately the same height in the jars with 2% and 3 % of 
sodium chloride, and grew better in these than in the higher concentrations, 
while Salicornia oliveri grew rather more quickly in the solution containing 
2 % of sodium chloride than in the other solutions. 
The cultures were on the whole more successful with Salicornia oliveri 
than with S. ramosissima , probably because the seedlings of the former 
were more easily transferred without injury to the culture solutions, as the 
seeds had germinated naturally in sand. The results obtained with 5 . oliveri 
are therefore selected to be given in detail. 
Table III gives the average increase in height of the plants of S. oliveri 
and shows how this was affected by the variation of the salinity. These 
averages were calculated from the measurements taken of the lengths of the 
main axis of the epicotyls of the six plants grown in each jar. 
Table III. 
Salicornia oliveri , Moss. 
Date. 
0% 
Growth in mm., 
1% 
in different concentrations ^/"NaCl. 
2% 3 % 4 % 
5 % 
May 8 
2-4 
3*3 
3-0 
2*9 i*6 
o *9 
3-3 
4-9 
5*4 
3-8 2-i 
o*6 
„ 22 
i *9 
3‘4 
3‘5 
3.6 2-3 
o*6 
„ 29 
i '5 
47 
5*3 
47 2*8 
1*0 
June 5 
i*i 
4 '° 
5*6 
4*4 3*3 
2*1 
‘ » 12 
07 
3‘4 
57 
4-6 3-2 
i*6 
„ 20 
o -5 
3-4 
4*9 
4*4 37 
i*6 
„ 27 
i -5 
3*9 
5*5 
5 *° 4*3 
2*6 
July 3 
o *3 
3*4 
47 
3*9 3’3 
2*0 
h in length 
July 3 
13-2 
34*4 
43'6 
37*3 26*6 
13-0 
These dates and figures are plotted in Diagram 3, and give a series of 
growth curves for the different degrees of salinity. From these curves it 
can be seen that from the beginning of the experiment growth was greatest 
