Bidspirit auction | Fair copy of treatises, 2

Fair copy of treatises, 2 vols. - Mathematics.- Fair copy of mathematical and physical treatises. Dated 1792. 2 volumes. 90 handwritten leaves (6 of which are blank) and 109 handwritten leaves (12 of which are blank). With 4 folded plates. Contemporary half-leather bindings with gilt spine labels (somewhat rubbed). 1. 'Geometry and Trigonometry Applied to Practical Field Surveying (!) 1792'. - On the first blank sheet, additionally titled in pencil by another hand: 'Initial Principles of Trigonometry (!) Part 2'. 2. 'Initial Principles of Mechanics'. Parts 4 and 5. - The plates with various drawings of pulleys and similar mechanisms. - On the first blank sheet, additionally titled in pencil by another hand. - Endpapers and frontispieces stained with glue.