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 284
O defcribe a reSlilinear Jigure,ivhic/i /Jiall be Jimilar to a given reBilinearJigure (equal to another (^^ ). ), and Upon defcribe i_ defcribe | | = ^^, and upon «_ and having ^M ^ … (B. I. pr. 45), and then smm Between and ■H»» will lie in the fame flraight line(B. I. prs. 29, 14), and nu»»H.. find a mean proportional(B. 6. pr. 13), and upon _^««_«i defcribe Jtt^ 9 iimilar toand fimilarly fituated Then For fince and are fimilar, and (confl.), ■ ■■■■■■■■■ (B. 6. pr. 20); 252…
Euclid's Elements · Geometry
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