From these two experiments we may safely conclude as Follows:
1. The alkali salts under examination act as an agent both toxic and stimulating upon the growth of rice seedlings, according to their concentrations.
2. The toxic concentration of magnesium sulphate and chloride, calcium chloride, sodium chloride and carbonate are greater than 1/100 normal while sodium sulphate and bicarbonate are greater than 1/50 normal.
3. The highest stimulation attains in the dilution of 1/500 normal magnesium sulphate, 1/1000-1/5000 normal magnesium chloride, 1/1000-1/5000 normal calcium chloride, 1/50-1/100 normal sodium chloride, 1/100-1/500 normal sodium carbonate and bicarbonate.
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