The following seeds, as seen above, were uninjured by this severe 

 test, the germinating percentages of both treated and untreated 

 seed being practically the same: Peas, cotton, beans, Kafir corn, 

 buckwheat, turnip, cabbage, cauliflower, pumpkin, cowpea, and 

 oats. It is safe, therefore, to conclude that none of the ordinary 

 methods of treating these seeds with carbon bisulphid will impair 

 their vitality. 



On the other hand, the germinative ability was decreased in bar- 

 ley, rye, wheat,, corn, crimson clover, millet, and rice, the difference 

 between the treated and untreated seed varying from 85 per cent in 

 the case of rye to 9 per cent in the chalky rice. With the exception 

 of crimson clover, whose seed is much more tender than that of other 

 clovers, all of the injured kinds belong to the grass family, oats 

 alone of this group showing no injury. This resistant character of 

 the oats is easily explained from the nature of its covering. 



This method was an extreme one and represents conditions which 

 would probably never be attained in actual practice. Here each seed, 

 being exposed to a thoroughly saturated atmosphere of the chemical, 

 had ample opportunity to imbibe as much of the vapor as it was 

 capable of retaining. It is reasonable to suppose that seeds whose 

 vitality was not affected by a 48-hour test of this kind, would be in 

 no danger of deterioration in this respect from any treatment given 

 them in ordinary practice. 



The varieties which were damaged by the 48 hours' treatment were 

 then subjected to another test of 24 hours' duration. As appears in 

 the table, some of the varieties suffered no deterioration whatever in 

 vitality with the 24-hours' treatment, while there was a marked 

 decrease in the amount of injury in all of them. 



PKR CENT GERMINATED. 

 NAME OF SEED. m, 



Rye proved the most susceptible to injury, with a difference of 41 

 per cent between treated and untreated seed. Millet showed 17.5 per 

 cent, barley 11 per cent, and crimson clover 6.5 per cent difference. 

 All differences in germination tests amounting to 5 per cent or less 



