INDUSTRIAL FUMIGATION AGAINST INSECTS 



Figure 2. — A battery of three modern steel fumigation vaults, each about 6 by 8 by 10 

 feet, equipped with apparatus for introducing and withdrawing the fumigant. and 

 for heating and circulating the air within. Such vaults are used for treatment of 

 various commodities, in this instance furs, and not ordinarily for continuous storage. 



Figure 3. 



A battery of 10 storage bins so constructed that dried-fruit products stored 

 in them can be fumigated. 



