Navigation.
Keith, Thomas. 1729-1824,
An introduction to the theory and practice of plane and spherical trigonometry, and the orthographic and stereographic projections of the sphere; in-
| cluding the theory of navigation. | London: the author. 1801. xv, (1), 414 pp. 8°,
**E.196.14 Same. 2d ed. Longman, Hurst, Reis, Orine & Brown. 1810. xiii, 420 pp. Diagrams. E.196.30