The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 143
the very foundation of his prin-ciples; for example, he observes tliat the lines of the courses of (heintrados should be made perpendicular to a line drawn between theextremities of the developement of the face of the arch, without evergiving any reason for it, or making any remark on the subject,… … there is a curve A G H, such that a tangent drawn from any point inthis curve is perpendicular to the face of the arch at the said point,as, the tangent G K, drawn from the point G is perpendicular to thedevelopement of the face of the arch B, G C, at the said point G. Nowif the courses were drawn…
Architecture · Civil engineering · Science
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