EQUIPMENT FOR FUMIGATING NURSERY STOCK 107 
time to time, as more o1 less dirt will rattle through 
the slats upon the floor. ‘The slats are used so that 
the gas can be generated underneath the nursery stock, 
thereby obtaining a more general diffusion. 
The jar containing the chemicals can be placed 
under the slats through the small doors at the base, 
FIG. 62—A COMPLETE FUMIGATING HOUSE IN UTAH 
dd, and very often it is advisable in a large room to 
have two doors of this character, so that the chemicals 
can be divided and the gas generated on opposite 
sides. Good results are obtained where this plan is 
followed. The small doors used for ventilation pur- 
poses, ¢ c, can vary in size to meet the conditions. 
The door entering the storeroom need not be double, 
and 3x6 feet is a convenient size. A good solid 
