The young trigonometer's compleat guide, being the mystery and rationale of plane trigonometry made clear and easy
2 volumes diagrams (folded) 20 cm
1150870
(from t. p.'s) v. 1. The mystery and rationale of plain trigonometry made clear and easy
v. 2. The mystery and rationale of spherical trigonometry mde clear and easy
V.2. Spherical trigonometry