258 
K. MIYAKK. 
On September iS, the measurement of the height was made. The 
results were as follows. 
Salts 
Amount of salts added to 2000 grams of soil 
used 
I g. mol. wti 
1 
}yg. mol. wt. 
mol. wt. 
■J-Qg. mol. wt. 
T5öS- moL wt - 
20QS- moL Wt - 
TöW>S- moL wt - 
Control. 
cm. 
cm. 
cm. 
cm. 
cm. 
cm. 
MgS0 4 
died 
died 
45 -o 
45.0 
40.S 
43-5 
43.5 
39.0 
MgCl 2 
died 
3 2 -0 
36.O 
45.0 
42.0 
39.0 
CaCl2 
» 
79 
18.0 
390 
40.5 
46.5 
39.0 
Na 3 S0 4 
>> 
36.0 
390 
40.5 
4S-o 
48.0 
39.0 
NaCl 
j} 
34.0 
34-5 
37-5 
43-5 
45.0 
39.0 
N 2 CO s 
>> 
died 
35-0 
42.O 
45 -o 
48.0 
39.0 
NaHC0 3 
50.0 
46.5 
5I.O 
43-5 
46.5 
39.0 
On October 15, the plants were harvested and weighed in the air dry- 
state. The results obtained are shown in p. 259. 
In this case as in the previous experiment, the growth of the plants 
was also injured or stimulated by each salt according to the amount. The 
toxic effect of magnesium chloride, calcium chloride, sodium chloride and 
carbonate appeared in amounts greater than i/ioo gram molecular weight, 
while that of sodium sulphate and bicarbonate and magnesium sulphate 
appeared in greater amount than 1/20, 1/20 and 1/10 gram molecular 
weight respectively. The highest stimulation was reached in amount of 
magnesium sulphate 1/20, magnesium chloride 1/200, calcium chloride 
1/1000, sodium sulphate 1/1000, sodium chloride 1/200, sodium carbonate 
and bicarbonate each 1/100 gram molecular weight. 
If we compare this result with that obtained in the previous experi- 
ment, we find that there is no slight difference in the amount of each 
salt regarding the toxicity and stimulation. The results obtained in the 
