Van Nostrand's eclectic engineering magazine (1869)
[New York : D. Van Nostrand] · leaf 223
will be a curve, several is an element of points of which will be needed in a con- the cylinder, the stone being seen from struction upon a large scale. These may above> and being taken from a course easily be found by drawing one or more •oar the crown of the arch. semicircles between D' V'C2 and… … points in which they out it. and hence The cross-bar ej ' perpendicular will be tangent to the projections on the and its upper edge also perpendicu- tO € same plane of the c j c's. "All the :.bove 3 r uo the plane remarki; epply also to the intersection of j ofabc » a' b' c' ■ - . - vl.h are. 1 j…
Engineering
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