ON THE " SATT WATER SELECTION " METHOD OF SEEDS. 439 



•selection " method should be abandoned as an inaccurate method of 



selection ; but those small farmers especially here in Japan might 



profitably use this method as a convenient method of selection 



■especially for cereals. 



With regard to leguminous grains, it seems that specific gravity 



has scarcely any relation to weight and the " specific gravity 



selection " method would not give good results. This fact has been 



shown by C. Ikeda of this College, whose results are given in the 



following table. The grains used were those of the soy bean but 



similar results can probably be got with other leguminous grains 



which often contain a large quantity of air. 



Number of grains with weight Number of grains with weight 

 Sp. gr. more than 160.0 mgr. less than 160.0 mgr. 



Below 1. 1 5 56^ 44% 



1. 15 —1. 175 64,, 36 



1. 175— 1.20 65,, 35 



1.20 — 1.225 64 36 



1.225 — 1.25 64 36 



Rape seed has also been examined by C. Kobayashi of this 

 College, whose results are giyen in a separate paper. It seems 

 from his result that the " salt water selection" can also be used for 

 its selection. 



