A 1911 magazine article describing Charles J. McPherson's new rotary comb roller cotton gin, which was intended to match the output of saw gins (400 to 500 pounds of lint per hour) without cutting the fiber. It compares roller and saw ginning, covering fiber damage, fire risk, worker injuries, waste, and price advantages. It also describes how the gin's ginning roll, comb roll, and suction fan work. Illustrated with a photograph of the machine and micrographs comparing saw-ginned and roller-ginned fibers.