52 results
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The description, use, and excellency of a new instrument, or sea quadrant, invented by Caleb Smith, for taking altitudes of the sun, moon, and stars, from the visible horizon (as well as any other Angular Distances at Land or Sea) without impediment or Interruption from the ship's motion; whereby the Latitude at Sea May be obtained with greater Certainty, and more frequently, than by Davis's or any other of the Common Instruments. Tried, approved, and recommended by Capt. Christopher Middleton, Capt. George Spurrel, Capt. Joseph Harrison, and several other able and experienced Navigators. To which is added, An Essay to make this Quadrant serviceable at Sea, as well as at Land, when there is no Horizon to be seen. As also The Usefulness of its Application to an Aximuth Compass of a New Contrivance for discovering the Variation of the Magnetic Needle, at Sea, without any Astronomical Calculation.
Smith, Caleb, active 1740.Date: [1740?]- Books
Horologiographia: or, The art of dyalling, : being the second book of the use of the trianguler-quadrant. Shewing the natural, artificial, and instrumental way, of making of sun-dials, on any flat superficies: with plain and easie directions, to discover their nature and affections, by the horizontal projection. With the way of drawing the usual ornaments on any plain: also, a familiar easie way to draw those lines on the ceiling of a room, by the trianguler quadrant. Also, the use of the same instrument in navigation; both for observation, and operation. Performing the use of several sea-instruments still in use. / By John Brown, philomath.
Brown, John (Philomath)Date: 1671- 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- Books
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The theory of Hadley's quadrant demonstrated; and from thence its nature, construction, and uses are fully shewn. With a table of the sun's declination for finding the latitude of the place. To which is added, a new construction of the quadrant, which, by Means of an artificial Horizon, renders it of universal Use by Sea and Land. By Benj. Martin.
Martin, Benjamin, 1705-1782.Date: [1760?]- Books
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The description and uses of the celestial and terrestrial globes, and of Collins's pocket-quadrant / By John Harris.
Harris, John, 1667?-1719.Date: 1710- Books
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Description, use, and method of adjusting Hadley's quadrant and sextant. By George Adams, Mathematical instrument maker to His Majesty, and optician to His Royal Highness the Prince of Wales.
Adams, George, 1750-1795.Date: M.DCC.LXXXIX. [1789]- Books
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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- Books
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The theory of Hadley's quadrant demonstrated; and from thence its nature, construction, and uses, are fully shewn. With a new table of the sun's declination for finding the latitude of the place. To which is added, a new construction of the quadrant, which, by Means of an artificial horizon, renders it of universal Use by Sea and Land. By Benj. Martin.
Martin, Benjamin, 1705-1782.Date: 1768- Books
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Short, but plain and easy, directions for the use of Hadley's quadrant. In which care is taken not to encumber it with more than is necessary, or needless encomiums, but to render it useful to the learner; it being now so well known to the world as not to want an advocate in its praise. To which is added, a description of the vernier scale, commonly call'd nonius's division.
Date: [1755?]- Books
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The description and uses of Barston's new-invented universal astronomical quadrant, which appears from authentick certificates transmitted to the Right Honourable the Lords of the Admiralty, to excel all others in navigation; and from repeated experiments of able astronomers, &c. to be more serviceable in astronomy, surveying of land, and dialling, than any other hitherto Invented.
Date: M,D.CCXL. [1740]- Pictures
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John Bird. Mezzotint by V. Green, 1776, after J. Lewis.
Lewis, John, approximately 1740-Date: Decr. 2. 1776Reference: 1120i- Books
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Directions for the use of Hadley's quadrant, with remarks on the construction of that instrument. With considerable corrections and additions. By the Reverend Mr. Ludlam, Late Fellow of St. John's College, Cambridge.
Ludlam, William, 1717-1788.Date: [1790]- Books
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A treatise containing the description and use of a new and curious quadrant, made and finished by the Masterly Hand of that Excellent Mechanic, John Rowley; For Taking of Altitudes, And for Solving various Mathematical Problems in Geometry, Navigation, Astronomy, &c. Some of them by a bare Inspection of the Instrument, and others by easy Operations on it. Studiously adapted to the meanest Capacities. To which are prefixed, an alphabetical exposition of the necessary terms of art, and a plate of the instrument. By T. W. F.R.S.
Woodford, Thomas, -1759.Date: MDCCLVI. [1756]- Archives and manuscripts
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MS Arabic 869
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The description and use of a portable instrument, vulgarly known by the name of Gunter's quadrant. By which is perform'd most propositions in astronomy; ... To which is added, the use of Nepiar's bones ... By William Leybourn. The third edition, with the addition of the use of Gunter's quadrant in taking the declination of a plain ... By Charles Leadbetter.
Leybourn, William, 1626-1716.Date: 1731 [1732]- Books
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The Construction and use of the sea quadrant, commonly called Hadley's quadrant. Containing such directions, as are necessary to render the use of this noble instrument both easy and certain, particularly with respect to the back observation, which has been hitherto neglected for want of proper instructions. To which is added, an introduction, explaining the theory of the instrument in a plain and familiar manner, with correct tables of the sun's declination, which being calculated for four years are thereby rendered perpetual.
Date: 1757- Books
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Instructions at large, for the use of Hadley's quadrant: wherein are contained the principles on which that most ingeniously contrived, and useful instrument is constructed; together with a description and use of Vermier's, enormously called Nonius's divisions.
Date: 1766- Books
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Instructions for the use of Hadley's quadrant, containing, the principles on which that admirable instrument is constructed, with a description and use of the Nonius divisions. As made and sold by George Adams, Mathematical Instrument-Maker to his Royal Highness George Prince of Wales. At Tycho Brahe's head in Fleet-Street, between Serjeant's-Inn and Water-Lane. Where Gentlemen may be supplied with all Sorts of Mathematical Instruments for Land or Sea; Tellescopes of all Sizes for Day or Night; together with all other Optical and Philosophical Instruments of the newest Invention.
Adams, George, 1750-1795.Date: 1789?]- Books
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The description and use of a portable instrument, vulgarly known by the name of Gunter's quadrant ... To which is added, the use of Nepiar's bones ... Collected and digested ... for the use of young practitioners. By William Leybourn.
Leybourn, William, 1626-1716.Date: 1721- Books
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A description of an accurate and simple method of adjusting Hadley's quadrant for the back observation. By Mr. Robert Blair. Published by order of the Committee of Longitude.
Blair, Robert, -1828.Date: 1788]- Books
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Useful, easy, directions for seamen, who use Hadley's quadrant. Shewing, to the meanest capacity, how to hold the quadrant to take the Fore and the Back Observations of the Sun and of a Star; and the Meaning of the Observations. How to examine whether the Index-Glass, and the Fore and Back Horizon-Glasses, stand in a right Posture; and how to set them right when they do not stand right. The Meaning of what is called the Dip of the Horizon, or the Height of the Eye above the Water; and how to find it by the Quadrant. The Meaning of what is called the Resraction of the Air, and how to prove it. Many other very necessary Things, which every Seaman, who uses the Quadrant, should understand, if he be desirous of knowing the Meaning of what he is about. A Book of this Sort has been much desired by some Seamen, and it may be very useful to many.
Date: [1772]- Books
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Directions for using the new improved Hadley's quadrant; with the new method of adjusting the glasses for the back observation. By his Majesty's Royal Patent. Made by P. and J. Dollond, Opticians To His Majesty, in St. Paul's Church Yard, London.
P. and J. DollondDate: 1772?]- Books
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The use of the mathematical instrument, called a quadrant: with which plainly and easily to know the exact height and distance of any steeple, Tree, or House, &c. Also to know the Hour of the Day by it; the Height of the Sun, Moon, or Stars; and to know the Time of the Sun-Rising and Setting; and the Length of every Day in the Year: The Place of the Sun in the Ecliptick, the Azimuth, Right Ascension, and Declination of the Sun; with many other necessary and delightful Conclusions. Perform'd very readily. As also the Use of a Nocturnal; whereby you may learn to know the Stars in Heaven, and the Hour of the Night by them. With many other delightful Operations.
W.P.Date: 1717- Books
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The description and use of a new quadrant, for finding the latitude at sea : invented and made, by Benjamin Cole, Mathematical and Optical Instrument-Maker, At the Orrery in Fleet-Street, London; Late the Shop of Mr. Thomas Wright, Instrument-Maker to his Majesty. The second edition. With an appendix, shewing some useful improvements on Cole's quadrant. Particularly Godfrey's Horizon Vane improv'd. Which furnishes the Mariner with the Means of taking an Observation easily in boisterous Weather. To which are added, Short and Plain Instructions for the Use of that most excellent Instrument, invented by John Hadley, Esq; with the Improvement of an Artificial Horizon.
Cole, Benjamin, 1695-1766.Date: MDCCXLIX. [1749]- Books
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The description and use of the sea octant, commonly called Hadley's quadrant; wherein its use is exemplified by proper examples and tables, and an account given of the new additional apparatus that are applied to it, for determining the latitude and longitude with the greatest possible Accuracy. To Which is Annexed, a Demonstration of the Theory of This Excellent Instrument. The second edition corrected. By William Jones Mathematical Instrument Maker.
Jones, William, 1763-1831.Date: [1795]