Elements of analytic geometry
A 1916 analytic geometry textbook by Alexander Ziwet and Louis Allen Hopkins, published by Macmillan in New York for American college students. The figures are line diagrams in black on white: labelled coordinate axes, conic sections with foci and asymptotes, tangent and normal constructions, a sine curve tied to its generating circle, and a three-dimensional sphere with Euler angles, all usable as clean geometric line art, dashed construction lines, and italic point labels.
