The practical draughtsman's book of industrial design, and machinist's and engineer's drawing companion: forming a complete course of mechanical, engineering, and architectural drawing (1866)
Armengaud, Charles A., 1813-1893, Armengaud, Charles, 1813-1893, [from old catalog] joint author, Amouroux, Jules, [from old catalog] joint author, Johnson, William, 1823-1864. [from old catalog] · Philadelphia, H. C. Baird · leaf 176
which, in conjunction with the bevilled top of theupper case, still further separates the suspended flour, and aidsthe ventilation. Another modification of stones relates to thecombination of three or more separate stones, instead of two, ashitherto used. In this plan, which is represented in fig.… … the central runner, and between the under surface of the latterand the upper surface of the bottom fixed stone at e. The grainis fed through the pipe, F, into the Fig-9. hopper, G, throughthe adjustable feed-passage into the pipe,H. Hence the supplyfor the upper grind-ing surfaces passesout by the…
Mechanical drawing
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