. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. Fig. 465. PROJECTION OF CURVED LINES. 1137. Curved lines not having their points in the same direction occupy a space whichbrings them imder the laws of those of surfaces. The projection of a curve on a planeparallel to the surface in which it lies (Jig. 464.) is similar to the

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