New plane and spherical trigonometry, surveying, and navigation
A school and college textbook of plane and spherical trigonometry with sections on surveying and navigation, written by George Albert Wentworth and published by Ginn & Company in Boston in 1903 for students and teachers. The 68 figures are line diagrams printed in black on aged paper: triangles with italic letter labels, arcs and spherical segments, dashed construction lines, and survey layouts, giving designers clean geometric marks and lettered notation for use as pattern elements or ornament.
