The description and use of an universal and perpetual mathematical instrument ... shewing the most expeditious and exact method of solving all practical questions in arithmetick, trigonometry, navigation, dyalling, astronomy, &c. ... / by Benjamin Scott.

  • Scott, Benjamin, -1755.
Date:
1733
Catalogue details

Licence: Public Domain Mark

Credit: The description and use of an universal and perpetual mathematical instrument ... shewing the most expeditious and exact method of solving all practical questions in arithmetick, trigonometry, navigation, dyalling, astronomy, &c. ... / by Benjamin Scott. Source: Wellcome Collection.

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    [C9] Golden Number, is the fame with the Cycle of the Moon, which fee. Gregorian Year, is the Reformation of the ‘Calendar by Pope Gregory XIIL. in the Year 1582, and is now in this Age, eleven Days be- fore the old Stile ufed by us in England, and will continue fo till the Year 1800, and then will be twelve Days before us, and fo on every hundred Years they will gain one Day. flovizon, is one of the fix great Circles of the Sphere, it divides the Heavens and the Earth into two equal Parts, or Hemifpheres, and is the Boundary of Day and Night, unto which, _ when the Sun, Moon, and Stars apparently come, they feem to rife and fer : Every particular Perfon upon Earth has a particular Horizon, the Poles of which are the Zenith and Nadir. Index, the two flat Pieces of Brafs that move upon the Center of the Inftrument marked with the Letters A and B, for Diftinction fake 3 and the Figures upon each of them are the Number of the concentrick Circles in the Inftrument, which is a ready Guide for you to any Circle at _ Pleafure. | Julian Year, or Account, is the old Account of the Year inftituted by Suius Cefar, which to this Day is ufed in England, and in all Pro- teftant Countries ; it is called the old Stile in Contradiction to the new Account, framed by Pope Gregory XIII. This Adianz Year contains 365 Days fix Hours, which faid fix Hours vie ears
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