35 DIVIDING POINTS. Therefore, on whichever side of v we measure the distance v T, so as to obtain either the point m, or the point N, if we measure the sight-magnitude a r' or a x on the opposite side of the line av, the line joining id m or x N will equally cut a v in b. … X a R' Fig. 14. The points m and n are called the “Dividing- Points” of the original line ab (Fig. 12.), and we resume the results of these corollaries in the fol¬ lowing three problems.
Perspective
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