EQUIPMENT FOR FUMIGATING NURSERY STOCK 109 
dirt floor will answer, provided the room is made per- 
fectly tight at the bottom. 
Two other model houses are shown in Figs. 60 and 
61. The former is for a large nursery, while the latter 
is used for a smaller concern, handling half a million 
FIG. 64—DOUBLE HOUSE IN CANADA FOR FUMIGATING TREES 
ON A WAGON 
trees or less. The latter is used for a storehouse when 
not in use for fumigation. 
One of the newest fumigating houses in the north- 
west is shown in Fig. 62. It is 10x 14 feet. The 
details of construction are about the same as those 
already given. ‘The ventilator and method of oper- 
ating it is shown in Fig. 63. This house, complete, 
cost about $70. 
Of the many fumigating houses in use in Canada 
