The carpenter and joiner's assistant : being a comprehensive treatise on the selection, preparation, and strength of materials, and the mechanical principles of framing, with their application in carpentry, joinery, and hand-railing : also, a course of instruction in practical geometry, geometrical lines, drawing, projection, and perspective : and an illustrated glossary of terms used in architecture and building (1860)
Newlands, James, 1813-1871 · Glasgow : Blackie and Son · leaf 46
ines until they meet straight lines D 1, D 2, D 3, D 4, meeting n h F and ole E in F and E, the circumference of the arch in l, m, which two last points are ’a - n, o. From B, through these points in the centres of the arcs n B, the circumference, draw Bo, Bn, B m, B l, and produce o B. them to… … ing line meets B G F, draw F II lc. Then n will be the cen¬ in d, c, e\ and on d, e tre of the arc c lc, and F the centre of the arc lc B. For erect the square cl, f g, e. the other side of the arch, draw fto parallel to A c; and The points d, e, f, g, are the from the centre line B D produced, set…
