Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 457
F is withdrawn, and they are received in the bags below the aperture G. These bags are madeof strong twilled woollen cloth, woven on purpose. They are then wrapped in a hair-cloth, lined with*ealher. The first pressure requires only a dozen blows of the stamper, after which the pouches are left… … The weight of the stampers is usually from 500 to 600 pounds; and the height from which they fallupon the wedges is from 16 to 21 inches. Such a mill as that now described can produce a pressure of from 50 to 75 tons upon each cake of thofollowing dimensions: 8 inches in the broader base, 7 inches…
Mechanical engineering
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