The builder's dictionary, or, Gentleman and architect's companion : explaining not only the terms of art in all the several parts of architecture, but also containing the theory and practice of the various branches thereof ... : also necessary problems in arithmetic, geometry, mechanics, perspective, hydraulics, and other mathematical sciences : together with the quantities proportions, and prices of all kinds of materials used in building ... (1734)
Toms, W. H. (William Henry), ca. 1700-ca. 1750, Devoto, John, fl. 1719-1752 · London : Printed for A. Bettesworth and C. Hitch ..., and S. Austen ... · leaf 41
me. To find the Length of anArch-Linc geumetricallv; Divide the Chord Line ABinto four equal Parts, and fct one of thofe Parts from B to C, and draw a Line from C. to three of thofe Parts at J); fo fhali CD be equal to half the Arch Line ACB. To find the Length of an Arch- LtKc x\riihmetically ;… … 19. 8 AC. 1^8. 434- 4 AB. 124Arch-Line 41. 333 Another Way.From the double Chord of thjrd Part of the Difference add-half the Segments ^Vrch fubtraft ed to the double Chord o ha tthe Chord of the Segment, one the Segments Arch, the Sum ts A R A R the Arch Line of the whole Seg-ment. Thus, if AG 19.…
Architecture · Building
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