By George Hadley, brother of John Hadley. Cf. ESTC.
|Contributions||Hadley, John, 1682-1744|
|The Physical Object|
|Pagination||30,  p.,  fold, leaf of plates :|
|Number of Pages||30|
The Description of a New Instrument for Taking Angles. By John Hadley, Esq; Vice-Pr. R. S. Communicated to the Society on May Hadley, J Philosophical. The description and use, of a new quadrant, for finding the latitude at sea: Invented and made, by Benjamin Cole, mathematical instrument-maker, at the Orrery in Fleetstreet, London, 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. John Hadley, (born Ap , Hertfordshire, England—died Febru , East Barnet, Hertfordshire), British mathematician and inventor who improved the reflecting telescope, producing the first such instrument of sufficient accuracy and power to be useful in astronomy.. Hadley’s first Newtonian reflector, built in , had a mirror about 6 inches (15 cm) in diameter. Buy A Description of a New Instrument for taking the Latitude or other Altitudes at Sea invented by John Hadley. With directions for its use by George Hadley, John Hadley (ISBN:) from Amazon's Book Store. Everyday low prices and free delivery on eligible : George Hadley, John Hadley.
2 For a quadrant: Patent No. Woodcroft, op. cit. (1), Hadley had presented his findings to the Royal Society: Hadley, John, ‘ The description of a new instrument for taking angles. By John Hadley, Esq; Vice-Pr. R. S. Communicated to the Society on May ’, Philosophical Transactions () 37, pp. – An example is held at the National Maritime Museum, Greenwich. Designed with the beginner in mind and useful to anyone interested in astronomy. Star Maps for Beginners is the classic guide to viewing and understanding the heavens. Its superb maps -- drawn in the shape of two crossed ellipses -- provide the reader with a unique perspective on the sky and have been widely acknowledged as the easiest system yet devised for locating any constellation at . 6. The octant, or Hadley Reflecting Quadrant as it was originally known, was simultaneously invented about in Philadelphia by a plumber and self-taught man of science named Thomas Godfrey and in England by John Hadley, a mathematician and mechanic employed by the instrument incorporated two principles of optics: first, that the angle of coincidence equaled the angle of. Invented by Mr. John Elton. Article. Jan ; John Elton; View. The Description of a New Instrument for Taking Angles. By John Hadley, Esq; Vice-Pr. R. S. Communicated to the Society on May
Vanished from history is the story of the ‘Mariner's Calculator’, invented and patented at the Great Seal Patent Office, London, by Mrs Janet Taylor, in John Hadley Person-Info (Ich bin John Hadley) London Oxford: Mathematiker Director Consultant Location Martin Industry British George University of Oxford Music Astronomen English Health: Netzwerk-Profile (1 - 4 von Topic: Subject or sitter Could I draw attention to the longstanding problem of who the sitter is in this portrait by John Downman, signed and dated The current Your Paintings entry broadly explains why we (National Maritime Museum) no longer believe it is the fifth Astronomer Royal, Nevil Maskelyne. An octant. The octant, also called reflecting quadrant, is a measuring instrument used primarily in navigation.. A Description of a New Instrument for taking the Latitude or other Altitudes at Sea [invented by John Hadley]. With directions for its use. [By George Hadley. With a folding plate.]. London: Printed for the Author,