Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 437
Fig. 2950 and 2954 show two pair of rollers for forming the astragal, to which the upper and lowerplates of the chimney of a locomotive are riveted; the rollers B B are used in the order the draw-mgs are lettered. Fig. 2963 shows a pair of rollers for forming the base mould, and Fig. 2949 for…
Mechanical engineering · Mechanics · Engineering
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