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 153
-2 or minus •~~ ^HH (Liitf BMMW ^Q (B. 2. pr. 6). FIGURE II. If •••■ do not pafs through the centre, draw FIGURE II. and ——-■ , Then minus (B. 2. pr. 6), that is, - X … minus % ,* (B. 3.pr. 18).Q. E. D. 122 BOOK III. PROP. XXXVII. THEOR.
Geometry
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