INFLUENCE OF THE ALKALI SALTS UPON THE GROWTH OF RICE PLANTS. 285 
j\j N. NaCl 
25 cc. + 
1 
lb 
N. CaCl 3 $ cc. 
70 
40 
9 
& N. NaCl 
20 cc. + 
1 
id 
N. CaQ 2 10 cc. 
70 
40 
9 
N. NaCl 
15 cc. + 
1 
1 0 
N. CaCl 2 1 5 cc. 
60 
25 
8 
^ N. NaCl 
10 cc. + 
1 
10 
N. CaCl 2 20 cc. 
56 
20 
8 
A N. NaCl 
5 cc. + 
3 
10 
N. CaCl 2 25 cc. 
50 
20 
6 
A N. CaCl 
2 3° cc - 
44 
22 
6 
J ö N. NaCl 
25 cc. + 
1 
10 
N. BaCl 2 5 cc. 
40 
20 
3 
N. NaCl 
20 cc. + 
1 
10 
N. BaCl 2 10 cc. 
4i 
18 
5 
5^5 N. NaCl 
1 5 cc. + 
1 
10 
N. BaQ 2 15 cc. 
30 
15 
3 
jL N. NaCl 
10 cc. + 
1 
10 
N. BaCl 2 20 cc. 
30 
20 
3 
^ N. NaCl 
5 cc. + 
1 
10 
N. BaCl 2 25 cc. 
28 
17 
3 
J 0 N. BaCl 
■z 3° cc - 
29 
10 
3 
Jg N. NaCl 
25 cc. + 
1 
10 
N. SrCl 3 5 cc. 
50 
22 
6 
•j-q J\. JNaCl 
20 cc. + 
TO 
N. SrCl. 2 10 cc. 
47 
20 
4 
N. NaCl 
15 cc. + 
JL 
10 
N. SrCl 2 15 cc. 
45 
16 
5 
N. NaCl 
10 cc. + 
1 
10 
N. SrCl 2 20 cc. 
40 
10 
4 
^5 N. NaCl 
5 cc. + 
1 
1 0 
N. SrCl a 25 cc. 
36 
16 
4 
3^5 N. SrCl. 
, 30 cc. 
28 
15 
3 
C. Summary. 
The injurious effect of the metallic ions upon the growth of rice 
seedlings is perfectly counteracted only by the presence of calcium ion 
while strontium ion can exert but a slight influence in neutralizing the 
toxicity of the other cations. Barium ion not only has no beneficial 
action, but rather a depressing effect is observed. It is tbus seen that 
barium or strontium in the concentration used can not replace calcium in 
its antagonistic action. 
