Proportion, or, The geometric principle of beauty, analysed
A geometric treatise on proportion in art, written by David Ramsay Hay and published in Edinburgh and London in 1843 by W. Blackwood and Sons for artists and students of design. Its pictures are plain line diagrams of circles divided into degrees, with angles, chords and right-angled constructions drawn in solid and dotted lines, showing how a designer might lay out a composition on a circular or angular grid.
