Metal-plate work : its patterns and their geometry, also, notes on metals, and rules in mensuration for the use of tin, iron, and zinc plate workers, coppersmiths, boiler-makers, and others (1887)
Millis, C. T. (Charles Thomas) · London ; New York : E. & F.N. Spon · leaf 81
70 METAL-PLATE WOEK. called a truncated pyramid, or a frustum of a pyramid. The faces of a truncated pyramid which is a frustum of a right pyramid are all equally inclined. In Fig. 33 is shown such a frustum standing on a horizontal plane. (34.) Comparison should here be made between this defini-… … b a tion and that of a frustum of a cone (see § 12), which it closely follows ; also between Fig. 21 and Fig. 33. (35.) Articles of equal taper or inclination of slant and having flat (plane) surfaces and top and base parallel (hexagonal coffee-pots ; hoods ; &c.), are portions of right pyramids…
Plating · Metallurgy
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