EQUIPMENT FOR FUMIGATING NURSERY STOCK 99 
secure the paper. The flooring can be joined very 
easily and will be tight. The ceiling and floor 
should be constructed in the same manner. In some 
cases a good solid clay floor will answer. Care should 
be taken to see that the house is absolutely tight at the 
FIG. 52—ROOM WHERE TREES ARE FUMIGATED BY THE 
WAGON-LOAD 
ground surface A ceiling six to seven feet in hight 
is most desirable and economical. 
One of the largest houses in the country in which 
nursery stock is fumigated is shown in Fig. 51. Itis 
32 x 16 x 8 feet with a roof-pitch of two feet, and is 
divided into two large rooms about 15 x 14 x 7 feet 
and two smaller rooms 4 x 5 x 7 feet. The flues lead- 
ing out at the top of the roof are so arranged they will 
