EXPERIMENT STATION BULLETINS. 221 



thrust into place. The bin should remain tightly closed for from 

 twenty-four to forty-eight hours, a longer exposure is likely to injure 

 the gerniinative power in some seeds. 



The liquid carbon bisulphide, on being liberated, will be quickly trans- 

 formed into a gas, which being heavier than the air, settles to the bot- 

 tom and fills all the air spaces between the seeds or kernels. The liquid 

 costs about thirty cents for a single pound, or five pounds for a dollar. 

 The work must be done in the day time, away from lamps, stoves or 

 fire of any sort. No fire must be allowed to come near until everything 

 has been thoroughly aired for the gas or fumes are very explosive when 

 mixed with air. Grain should be shoveled over several times. Great 

 care must be observed to breathe as little as possible of the fumes as 

 they are very poisonous and will as easily produce death among men 

 as among insects. 



