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The illustrated architectural, engineering, & mechanical drawing-book : for the use of schools, students, and artisans ; upwards of 300 illustrations (1856)

Burn, Robert Scott · London : Ward and Lock, 158 Fleet Street · leaf 109

An illustration from The illustrated architectural, engineering, & mechanical drawing-book : for the use of schools, students, and artisans ; upwards of 300 illustrations, 1856, leaf 109 — fig. 2. Example 3, fig. 3, where a h is the span of the arch ; c cZ its rise ; … fiir. 4. a (Z 6 the inside curve, called the softit, or intrados ; the key-stone is g. ENGINEERING, AND MECHANICAL DRAWING-BOOK. The exterior or upper curve of the arch is called the extrados/ 107

Architectural drawing · Mechanical drawing

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More pictures from The illustrated architectural, engineering, & mechanical drawing-book : for the use of schools, students, and artisans ; upwards of 300 illustrations

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