The wheat is separated from the chaff and automatically weighed into sacks, which are dumped as fast as two expert sewers can work.

The motive power is a traction engine or else twenty to thirty horses, and seventy-five acres a day can be reaped and threshed.
Often another tractor pulling a dozen wagons follows and the sacks are picked up and hauled to the granary or elevator.
Haying was once the hardest work on the farm, and in no crop has machinery been more efficient.

The basic idea in the reaper, the cutter-bar, is the whole of the mower, and the machine developed with the reaper.

Previously Jeremiah Bailey, of Chester County, Pennsylvania, had patented in 1822 a machine drawn by horses carrying a revolving wheel with six scythes, which was widely used.

The inventions of Manning, Hussey, and McCormick made the mower practicable.