**5089a.71 Gunter, E. 1581-1626. The cross-staff, ... (Continued) ‘ portable quadrant, for the more easie finding the hour and azimuth, and other solar conclu- sions of more frequent use. London; F. Eglesfield. 1673. 197-309, (3), 164 pp. Sm. 4°. Published in his Works.