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Courtesy of Bulletin of Pan American Union

CLEANSING,

When dry the beans  are   taken   to   the   machine for cleaning and  hulling. A blower carries off the dust: then in the hulling  machine the beans   oass

between corrugated surfaces,   where by  friction  the inner coverings are  loosened,   and a second  blower throws out  the  hulls  and  dust.

By machinery the beans are then sorted as to size and weight, and from the last machine they fall into bags for shipment.