Concept
Quadrants (Astronomical instruments)
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The sector on a quadrant, or, a treatise containing the description and use of four several quadrants; two small ones and two great ones, each rendred many wayes, both general and particular. Each of them accomodated for dyalling; for the resolving of all proportions instrumentally; and for the ready finding the hour and azimuth universally in the equal limbe. Of great use to seamen and practioners in the mathematicks / Written by John Collins accountant philomath. Also an appendix touching reflected dyalling [by J. Lyon] From a glass placed at any reclination.
Collins, John, 1625-1683.Date: 1659
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MS Arabic 593
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The description and use of a portable instrument, vlugarly [sic] known by the name of Gunters quadrant : by which is perform'd most propositions in astronomy, as the altitude, azimuth, right ascention, and declination of the sun, &c. : also his rising, and setting and amplitude, together with the hour of the day or night, and other condusions exemplified at large : to which is added the use of Nepiars bones in multiplication, division, and extraction of roots, also the the nocturnal, the ring dial, and Gunters-line, in many necessary and delightful conclusions, fitted to the understanding of the meanest capacity : collected and digested into this portable volumn, for the use of young practitioners / by a true lover of the mathematicks.
Gunter, Edmund, 1581-1626Date: 1685- Books
The description and use of the trianguler-quadrant : being a particular and general instrument, useful at land or sea; both for observation and operation. More universally useful, portable and convenient, than any other yet discovered. With its uses in arithmetick. Geometry, superficial and solid. Astronomy. Dyalling, three wayes. Gaging. Navigation. In a method not before used. By John Brown, philomath.
Brown, John (Philomath)Date: 1671
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MS Arabic 869