The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 401
Let A B Cfig. 1.) be the elevation of an oblique arch, on a plane atright angles to the axis of the cylinder on which it is formed, and letc be the centre, and a the point at which any joint a m in the face ofthe arch meets the intrado. Fig. 2. … Let C D E (fig. •2,) be the plan of the same, (part of the arch beingsupposed to be removed), and let o be the position in plan of thepoint a (fig. 1.) Suppose a vertical plane P P to pass through thepoint a, intersecting the spiral surface c/ a m in the line a V. From/ let/ m be drawn a tangent to…
Architecture · Civil engineering · Science
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