Quadrants (Astronomical instruments) - Early works to 1800
Works from the collections
6 works
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This instrument is made only by Thomas Heath, at the Hercules, next to the Fountain Tavern in the Strand, having the patterns corrected by the translator
Heath, Thomas 1698-1773.Date: 1735- Books
- Online
The use of a mathematical instrument, called a quadrant : Shewing very plainly and easily to know the exact height or 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 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. Performed very readily. Written by [W.P.].
W. P.Date: 1655- E-books
- Online
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
- Online
The use of a mathematical instrument, called a quadrant : Shewing very plainly and easily to know the exact height or 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 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. Performed 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. The fourth edition, wherein the mistakes in the former impressions are corrected. By W.P.
W. P.Date: 1670- E-books
- Online
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