o2 
but they invariably died in the course of a few seconds or min- 
utes. Fig. 50, Plate 4, shows a hopperdozer in operation in a 
hay-field. A narrow strip was cut around the margin of the 
field and the hopperdozer drawn around in this strip, with great 
success. Fig. 29. Plate 3, shows two fastened together and drawn 
side by side. Figs. 31 and 82 show two other hopperdozers more 

Fig. 31.—Large Hopperdozer, with partitions. After Riley. 
in detail so as to enable anybody, even with but little ingenuity, 
to make them. The nature of the ground in the infested re- 
gion did not, in many places, admit of using more than one 
hopperdozer at a time. 




Fig. 32.-Smaller Hopperdozer. After Riley. 
The farmers in the infested region watched with great inter- 
est the operations with the few hopperdozers first made and 
used upon the farm of Mr. Stannard. Many farmers from far 
and near were present and when they saw the possibilities of 
these simple machines they were not slow to realize that by 
faithful work they could largely protect their very promising 
crops. Generally speaking the farmers showed a very com- 
