32 
Although the chain cultivator was designed primarily for bringing 
the squares to the middles, it was found in field practice to have a 
most important cultural effect. The chains (so-called “ log chains”) 
are heavy enough to establish a perfect dust mulch (see figs. 7 and 8) 
and to destroy small weeds that may be starting. In fact, it is believed 
that this cultural effect would more than justify the use of the ma- 
chine, regardless of the weevil. With the effect against. the insect 
and the important cultural effect it is believed that this implement or 
Tic. 7.—Work on the chain cultivator: Cotton row before use of cultivator, showing 
fallen squares, crack, and rough condition of ground. (Original.) 
one similar to it should be used by every farmer in the weevil 
territory. 
In order that the use of this machine could be obtained by all farm- 
ers at the smallest possible cost, a patent has been taken out in the 
name of the Department of Agriculture and for the benefit of the 
people of the United States. Under this patent it is impossible for 
anyone to manufacture the machine exclusively and to charge unnec- 
essarily high prices. 
344 
