A Treatise on Plane and Spherical Trigonometry: With Their Most Useful Practical Applications

A Treatise on Plane and Spherical Trigonometry: With Their Most Useful Practical Applications. By John BonnycastleLondon: 1806. Hardback, first edition. Full marbled or mottled calf, with gilt-blocked title and bands to spine. Octavo/8to, measures around 5 1/2" x 8 1/2" x 1 1/4", xxviii + 419 pp and one-page list of errata at rear. Extensive scuffing and wear to binding, especially to spine, with gilt detail somewhat faded, though title still visible. Rubbing at edges, hinges and corners, which are bumped, with a little tearing. Some cracking to inner hinges but binding quite firm. Page edges which are browned, scuffed and otherwise marked. Marking to pastedowns with pencil writing and mathematical calculations. Some loss to corners or top outer corners of preliminary parges up to introduction and loss to bottom outer corners of leaves covering pages 81-84. The occasional other tear and some dog-eared corners and creased. Staining to half-title and title pages, some scribble marks to title page. The odd dog-eared page corner. Some light foxing to pages throughout, a little toning at edges. Occasional thumbing and other marking. Some pencil marginalia and child's scribbling to a number of pages throughout. Worming to upper outer corners of pages from 344 to rear pastedown, though only more noticeable to final pages towards rear. See pictures for further information. xxviii, 419 pp.…