CIRCULAR ,369, U. S. DEPT. OP AGRICULTURE 



Figure 4. — A vacuum fumigating unit in a large general-merchandise storage warehouse. 

 Since it is located along the railroad siding, susceptible commodities are fumigated as 

 they are unloaded from the freight car and before they are placed in storage rooms, 

 where only fumigated supplies are stored. 



Figure 5. — Commodities of various types assembled for export on a modern dock. Carload 

 lots of supplies found slightly infested upon arrival by rail are sometimes fumigated 

 beneath rubberized tarpaulins. While such treatments are not always entirely satisfac- 

 tory, they are. resorted to in numerous instances. 



