22 INJURIOUS INSECTS OF I909 AND IQIO. 
strewing the same amongst the plants, taking care not to place it 
directly against a plant. Spraying garden vegetables and other 
plants with arsenate of lead, 4 pounds to too gallons of water, 
would also serve to protect them. 
(6) Hoprprerpozers: These, though not giving complete sat- 
isfaction, are regarded as one of the best helps; in fact, almost the 
only help, for a farmer upon whose crops the grasshoppers are pour- 
ing from adjacent unplowed fields. Hopperdozers are made of 
sheet iron, generally 16 feet long (though they may be shorter), 
and the drawing which accompanies this article illustrates a general 
Fig. 14. Experimenting on small scale with arsenite of soda. Original. 
plan. The upright part behind may be canvas or cloth, or of sheet 
iron. With the details suggested by Fig. 8 farmers should be 
able to construct one to suit their needs, and possibly improve upon 
the plans given. I might say, in this connection, that a horse at 
each end is better than one horse in the middle. When wanted for 
use, a little water is placed in the pan and also thrown against the 
canvas-cover back, if canvas is used. This back is then drenched 
with kerosene, and about two quarts of the oi! are poured on the 
water in the pan. The machine is driven back and forth over fields 
of young grain or flax which is being eaten, and bushels of the 
insects are killed in this way. This work is’ best done when the 
day is bright and warm, and before the insects reach full size. Even 
though a grasshopper may jump out of the pan.—if he has been in 
the kerosene, he is doomed. 
