Descriptive geometry
A 1921 Macmillan textbook of descriptive geometry by George Young Jr. and Hubert Eugene Baxter, written for American engineering and drafting students. The 217 line diagrams show horizontal and vertical projection planes drawn in perspective, with lettered points, dotted construction lines, hatched cutting planes, cones and pyramids; useful as spare geometric line art, axis-and-plane motifs, and hatching patterns.
