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 81
e horizontal pro¬ jections of the points of the entry and exit of the cone into the sphere, and the vertical projections of the same will be i’ f . In repeating this operation for every one of the lines in Fig. 318, points will be obtained through which to draw the curves of intersection; but this… … centres f' e of the two circles. From c, as a centre, definite line with the radius c d, describe the arc d cV) and from the c D, to be the same centre, with the radius c f, describe the arc f f. horizontal pro¬ From the last point raise a perpendicular, on which set jection of the off the height…
