Author: Macnab, John:
Title: Trigonometry Simplified With Nautical Astronomy For Seamen and Others.
Description: London, George Philip & Son, 1920 7th ED., revised and enlarged, H/B blue cloth bds, VG, contents fine and tight. Solution of plane and spherical triangles and application of the same to the various problems in navigation and nautical astronomy. Proving "Identities".With chart drawing, and mensuration of surfaces, solids and spaces construction of sundials.

Keywords: trigonometry nautical astronomy seamen navigation identities chart drawing sundials