Be FARMERS’ BULLETIN 691. 
soldered across it to keep the liquid from running to one end and 
spilling when operated on sloping ground. The sled floor is 184 
inches from front to rear, bemg made of one board 1 by 6 inches and 
one 1 by 12 inches with a narrow space between. It can be either 
8 or 15 feet long to hold either one or two pans. <A strip 1 by 4 inches 
on edge around it keeps the pans from sliding off. The runners are 
pieces of 2 by 4 lumber 4 feet long, laid flat and rounded at the front 
ends. They should extend about equal distances in front of and 
behind the floor. An 8-foot sled needs two runners and a 15-foot 
sled needs three. The screen behind the pans should be of oilcloth, 
smooth side forward, nailed to uprights at the back of the sled. 
The hitch is made by nailing a 2 by 4 across the runners in front of the 
pan and letting the ends project 2 or 3 feet at each side. Each end 
is braced by a board 
extending to the end 
_of the runner behind 
the pan. 
For use, the com- 
partments of the pan 
should be half filled 
with water and enough 
kerosene or crude oil 
should be added _ to 
form a film. If tar is 
used, a thin layer is 
spread in the bottoms 
of the otherwise empty 
pans. As the hopper- 
dozer is drawn forward 
the grasshoppers jump 
Fra. 11.—A successful type of horse-drawn hopperdozer. up and fall into the 
pea mel) pan, or strike against 
the screen at the back and drop in. Contact with a little tar or a 
wetting with the oil kills them, even though they jump out after- 
wards. The dead that collect must be shoveled out at intervals and 
the tar or oil and water replaced. 
When large fields of fairly level land are to be treated with the 
hopperdozer, two or three pans are often set on the teeth of a sweep 
rake. This makes the work easy for the team, but on rough ground 
the liquid slops badly. In such cases two sleds holding two pans 
each, having for runners pieces of 2 by 4 set on edge, should be 
placed end to end. The two adjacent-runners should be loosely bolted 
together through a 2 by 4, which is placed on edge between them. The 
middle 2 by 4 should project behind from 4 to 5 feet, and from its end a 
strong wire should be stretched to the outer back corner of each sled. 
