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farm machine that mechanically harvests a crop. Small-grain harvesting has been mechanized to a certain extent since early times. In the modern period the first harvester to gain general acceptance was made by Cyrus McCormick in 1831 (see reaper).
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An employee who picks or discards slate and other foreign matter from the coal in an anthracite breaker or at a picking table.
A mechanical arrangement for removing slate from coal.
A machine used to pull apart and separate cotton fibers.