The first six books of the elements of Euclid, in which coloured diagrams and symbols are used instead of letters for the greater ease of learners (1847)
Byrne, Oliver, Whittingham, Charles, 1795-1876, Chiswick Press · London : William Pickering · leaf 123
FIGURE III. … NE circ/e can-not touch ano-ther, eitherexternally or internally, in more points than one. Fig. I. For, if it be poffible, letand f 1 touch one o another internally in two points;draw ——- joining their cen-tres, and produce it until it pafsthrough one of the points of contadl (B. 3. pr. 11.);draw…
Euclid's Elements · Geometry
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