Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 130
to thesize of the beans which pass under them, so that a small bean cannot pass through unhulled and alarge bean passes through unbroken; thus hulling both small and large beans. The coffee and thehulls fall from the hulling plates, or pads, on to a set of sieves, which are so arranged that they… … allow the coffee to fall through the sieves on the chute, which conducts it into the receptacle placedto receive it. The coffee being free from hulls, it is necessary to give it a thorough cleaning and polishing,thereby removing the fine silver skin which closely adheres to the beans. An improved…
Mechanical engineering -- Dictionaries
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