FUMIGATION WITH CARBON BISULPHID 273 



shut down and closed up tight. We find the best 

 results from the use of carbon bisulphid can be obtained 

 by spraying it on the floors and in infested places. We 

 think when placed in plates it does not evaporate quick 

 enough to produce the death atmosphere required." 



Extra precautions. The writer has called atten- 

 tion to the dangers from fire when the fumes of carbon 

 bisulphid are present. Special reference is now made 

 in connection with the treatment of buildings with this 

 gas. Not even a lighted cigar or pipe should be al- 

 lowed in the building. Always do the work in day- 

 light. No artificial lights of any kind are allowable. 

 Bven electric lights should not be used. When turn- 

 ing them on or off there is always danger of producing 

 a spark, which might prove disastrous. Heated steam- 

 pipes should be allowed to cool before the application is 

 made. Electric fans should not be run. There should 

 be no heat of any kind in the building while the vapor 

 is enclosed. Owners of adjoining premises should be 

 informed of the nature of the work being done and 

 cautioned to be on their guard during the hours of 

 fumigation. 



Germination of seeds. Fifty-four varieties of seeds, 

 including the principal grain and garden seeds, were 

 recently treated with carbon bisulphid by the Division 

 of Botany, United States Department of Agriculture. 

 Every precaution was taken to insure uniformity in 

 the seeds of each lot, treated and untreated. The 

 treated lots were exposed to an atmosphere saturated 

 with carbon bisulphid vapor for forty-eight hours. 

 Under the most extreme treatment, the severity of 



