An elementary treatise on modern pure geometry
A textbook of projective and synthetic geometry written by Robert Lachlan and published by Macmillan in London and New York in 1893, aimed at university students and mathematics teachers. The 137 figures are line diagrams of circles, triangles, and transversals built from solid, dashed, and dash-dot strokes with serif point labels, useful as ready-made geometric lattices, overlay linework, or cover motifs.
