Beschreibung:

i. Rea, Roger. The sector and plain scale compared. London: J. Cluer for the author, 1717, FIRST EDITION, 8vo, 3 folding woodcut plates, contemporary calf, (bought from Chaucer Head, Presteigne, 1997), [T&W R18; ESTC T94813], some wear to binding ii. [Stone, Edmund (d.1768)] The description, nature and general use of the sector and plain-scale... second edition. London: Tho. Wright, 1728, 8vo, 3 folding engraved plates, modern blue cloth, uncut, (bought from Martayan Lan, New York, 1985), [T&W S200; ESTC T65033 (4 copies; a single copy of the previous edition is located)], small inkstain on one plate iii. Cunn, Samuel. A new treatise of the construction and use of the sector. London: Wilcox & Heath, 1729, FIRST EDITION, 8vo, 2 engraved folding pates, diagrams, contemporary calf, modern folding cloth box, (bought from Bernard Quaritch, London, 1981), [T&W C210; ESTC T113886], rebacked iv. Pennington, Robert. The description of a sector... of great use to all clock and watch makers. London: Richardson & Urquhart, 1780, FIRST EDITION, 8vo, title folded at foot with manuscript note about the author, folding engraved plate, modern wrappers, (bought from Jonathan Hill, New York, 1987), [T&W P35; ESTC T105392