The sheet-metal worker's guide : a practical handbook for tinsmiths, coppersmiths, zincworkers, etc., comprising numerous geometrical diagrams and working patterns, with descriptive text (1888)
Crane, W. J. E. (W. J. Eden) · London : Lockwood and Son · leaf 65
53 POLYHEDRONS. five regular polyhedrons. It is termed, geo- metrically, a tetrahedron, or four- sided figure. The next most simple solid is the cube … Fig. 48. (a, Fig. 46). This is known by the geometrical name of a hexahedron, or six-sided " figure, The development (shown also at Fig. 46) needs no explanation. A square, c b e d, is first Fig. 49. formed by any process, and the adjacent squares BGFE, MNCB, EOPD, and c D H T, added to its sides,…
Sheet-metal work
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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