Modern carpentry and joinery : being a compilation of the very best things and most modern and practical methods known in the arts of carpentry and joinery (1910)
Hodgson, Frederick Thomas, 1836- · Chicago : F. J. Drake & Co. · leaf 131
Fig. 91. 128 MODERN CARPENTRY To find the covering of an annular vault. Let ACKGEFA (Fig. 92) be the generating sec-tion of the vault. On A C describe a semi-circle ABC,and divide its circumference into equal parts, repre-senting the boards of the covering. From the divisionsof the semi-circle, b,… … Fig. 92. the annulus, with the radii D r, D s, &c., describe theconcentric circles, s q, &c., representing the coveringboards in plan. Tlirough the centre D draw PI K per-pendicular to G C, indefiniteh- extending it through K.Join the points of division of the semi-circle, A b, b m,m t, by…
Carpentry
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