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The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 382
have 3A, + A, ^ 20<p; and we find that s t is contained 28 times in the arc a 4 ; 108.-. 120^ -^ ^, = —&; 3^1 ■(■ Aa = 209; and 28Aj = 20?. Eliminating A, and A^, we find 29205 fl = p = 12-9 times © nearly ; 2268 f 1 , .•. 36° 40 «= Z A 0 N is laid off with as much ease and certainty as by a… … Fig. 2.Referring to fig. 2, we have laid off 29 small arcs from A to 29 = €. AB = <ii =ic ~ cd = de =• ef. And a j = S h^of = A,; hg = A^. 352 THE CIVIL ENGINEER AND ARCHITECTS JOURNAL iXov .-. 3 X 2D9 + A. = 300^ = ,8 = mf<p 1 A. (1) 2 A, - A„ = 20 1}), or n A, + A J = e (jj (2) 13 Aa =…Architecture · Civil engineering · Science
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