The triangular quadrant: or The quadrant on a sector

Publication Date1662
RemainderBeing a general instrument for land or sea observations. Performing all the uses of the ordinary sea instruments; as Davis quadrant, forestaff, crosstaff, bow, with more ease, profitableness, and conveniency, and as much exactness as any or all of them. Moreover, it may be made a particular, and a general quadrant for all latitudes, and have the sector lines also. To which is added a rectifying table, to find the suns true declination to a minute or two, any day or hour of the 4 years: whereby to find the latitude of a place by a meridian, or any two other altitudes of the sun or stars. First thus contrived and made by John Brown
Extent24 p., [2] leaves of plates
PublisherFirst thus contrived and made by John Browne] at the Sphere and Dial in the Minories, and to be sold at [his] house, or at Hen. Sutton's in Thred-needle-street behind the Exchange


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Sun Sep 24 08:15:48 CDT 2023