Concept
Navigation - Instruments - Early works to 1800
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A brief description of a new instrument, invented by Mr. Caleb Smith, for taking altitudes of the sun, moon, and stars, from the visible horizon; or any other angles at sea: Whereby the interruption, and inconvenience, occasioned by the ship's motion, in observing with the quadrants commonly used, is remedied, and prevented. And the latitude found with great ease, accuracy, and expedition. With directions how to use it at Sea. Made and sold by George Adams, at Tycho Brahe's Head, near the Castle-Tavern in Fleetstreet, London; who makes, and sells, by wholesale and retale, and sorts of mathematical instruments, for land and sea, curiously and exactly finished in silver, brass, ivory, wood, &c. for the purposes of geometry, surveying, gauging, measuring, architecture, astronomy, geograghy, navigation, &c.
Smith, Caleb, active 1740.Date: 1732-1735]- Books
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Posthuma Fosteri : the description of a ruler, upon which is inscribed divers scales: and the vses thereof: invented and written by Mr. Samuel Foster, late professor of astronomie in Gresham-Colledg. By which the most usuall propositions in astronomie, navigation, and dialling, are facily performed. Also, a further use of the said scales in deliniating of far declining dials; and of those that decline and recline, three severall wayes. With the deliniating of all horizontall dials, between 30, and 60 gr of latitude, without drawing any lines but the houres themselves.
Foster, Samuel, -1652Date: 1652- Books
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Posthuma Fosteri : the description of a ruler, upon which is inscribed divers scales: and the uses thereof: invented and written by Mr. Samuel Foster, late professor of astronomie in Gresham-Colledg. By which the most usual propositions in astronomy, navigation, and dialling, are facily performed. Also, a further use of the said scales in deliniating of far declining dials; and of those that decline and recline, three severall wayes. With the deliniating of all horizontall dials, between 30 and 60 gr. of latitude, without drawing any lines but the houres themselves.
Foster, Samuel, -1652Date: 1654