The first six books of the Elements of Euclid, in which coloured diagrams and symbols are used instead of letters .. (1847)
Euclid, Byrne, Oliver · London, W. Pickering · leaf 17
th; R 1 INTRODUCTION. xv this plainly appears from reafoning, limilar to that juft em-ployed in defining, or rather defcribing a point and a line. The propofition which we have felefted to elucidate themanner in which the principles are applied, is the fifth ofthe firft Book. In an ifofceles… … we have and ^^ common : and Again in = ^ (B. ,. pr. +.)Z7^ \ , xvi INTRODUCTION.
Geometry
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