44 



CIRCULAR 369, U. S. PEPT. OF AGRICULTURE 



If it is necessary to enter the storage room while it is under fumi- 

 gation, the operator should wear a gas mask equipped with a canister 

 designed for protection against the particular gas that is being used 

 and should remain in the room only long enough to obtain the 

 garment needed. 



Figure 3G. — Interior of fur-storage vault with racks installed for holding garments in 

 best possible position for ready access and effective fumigation. 



DOSAGES 



For the fumigation of the large storage sections a dosage of 14 

 pounds of the ethylene dichloride-carbon tetrachloride mixture, 15 

 pounds of ethylene oxide-carbon dioxide mixture, 20 pounds of 

 methyl bromide-carbon dioxide mixture, or 30 pounds of a methyl 

 formate-carbon dioxide mixture should be used per 1,000 cubic feet 

 of space, with a week-end exposure from Saturday afternoon until 

 Monday morning. 



For the preliminary fumigation of fur garments in small vaults 

 the same fumigants and the same dosages recommended for the 

 large storage sections can be used, although an exposure of 12 to 

 24 hours is sufficient. 



EFFECT OF FUMIGATION ON FURS 



Fur garments appear to be in no way affected by the vapors of 

 the fumigants recommended, and dry storage has no deleterious ef- 

 fect upon the furs. A few instances of change in color of furs 

 stored in fumigable storage have been reported, but in no case has 

 this been clearly shown to be the result of fumigation. Thousands 

 of dollars' worth of furs are being stored annually in fumigable 

 storages throughout the country, to the satisfaction of all concerned. 



