COLLINS, JOHN. The Sector on a Quadrant; or, A Treatise containing the Description and Use of Four Several Quadrants . . . Of great use to Seamen and Practitioners in the Mathematicks. 6 leaves of engraved illustrations of quadrants and scales by Henry Sutton; woodcut text diagrams throughout. [16], 284; [2], 54, [8]; [2], 26 pages. 4to, 181x137 mm, contemporary sheep, spine heavily worn and chipped, front joint cracked and bonded; intermittent marginal dampstaining, most conspicuous on opening leaves, including the first 2 engravings. London: J. M. for George Hurlock et al., 1659