Patent for improvement in stalk-choppers particularly adapted for chopping cotton. When the chopper is started the sprocket upon one of the traveling wheels will impart motion to the sprocket through the medium of the sprocket-chain, which will rotate the gear-wheel and in turn the pinion and the crank will impart a reciprocatory motion to the pitman and the horizontal bar, this will give the cutter-blade a reciprocatory motion. The speed of the reciprocatory chopping blade can be regulated. (Lines 45-55) Illustration is included.