K. MIYAKE. 
Jg N. MgCl^ 10 cc. + Jg N. BaCl 3 20 cc. 
28 
7 
1 
N. MgCl 2 5 cc. + gJg N. BaCl 2 25 cc. 
28 
5 
1 
yk N. BaCl 2 30 cc. 
24 
8 
1 
Jg N. MgCl 2 25 cc. + J y N. SrCl 2 5 cc. 
60 
12 
3 
Jj N. MgCl 2 20 cc. + Jg N. SrCl 2 10 cc. 
45 
8 
3 
T V N. MgCl 2 1 5 cc. + Jg N. SrCl 2 1 5 cc. 
40 
5 
2 
T ^g N. MgCl 2 10 cc. + Jg N. SrCl 2 20 cc. 
35 
7 
1 
Jg N. MgCl 2 5 cc. + Jg N. SrCl 2 25 cc. 
30 
9 
1 
g'g N. SrCl 2 30 cc. 
22 
8 
1 
The result shows that the presence of* 'calcium in proper proportion 
can exert a beneficial action, while in the case of barium, on the contrary, 
a depression resulted. Although strontium in suitable proportion retarded 
the toxic action of magnesium, it is far inferior to calcium. 
B. Experiment with NaCl. 
Twenty beakers, each containing 30 cc. of culture fluids, served for 
the experiment. The culture solutions were prepared in the same propor- 
tion as in experiment A, excepting the use of sodium chloride in place 
of magnesium chloride. 
Five seedlings, about 20 mm. high, were transplanted in each beaker 
on March yth (1913) and kept in a green house. The evaporated water 
was supplemented with distilled water from time to time as in the preced- 
ing experiment. The plants had developed |very well with remarkable 
differences in growth. The plants were measured on March 24th with the 
following result which coincides with that of the preceding experiment. 
Length 
Length 
Number 
Solutions used 
of leaf 
of root 
of roots 
Distilled water 30 cc. 
65 
50 
9 
•jg N. NaCl 30 cc. 
44 
13 
1 
