Leybourn, William, editor. d. 1690? Ey Gunter, Zdmund. 1581-1626. **5089a.71 Works: containing the description and use of the sector, cross-staff, bow, quadrant, and other in- struments. With a canon of artifical sines and tangents to a radius of 10.0000 parts, and the | logarithms from an unite to 10.000, ete, - Added, The description and use of another sector and quadrant, invented by Sam. Foster. 5th ed., correct- ed etc.) . By William Leybourn. | (Continued)