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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    4] Capricorn, the Goat mark’d thus, W, the roth Sign in the Zodiack, a Cardinal, and the fouth tropical Sign, unto which when the Sun comes, bias is on the roth of December, he makes the longeft Nights, and fhorteft Days to all on the north Side the Equator; the Sun has then the greateft fouth Declination and Am- plitude, but the leait meridian Altitude to all ~ northern Inhabitants, but to the fourhern juit the contrary. | Co-Sine, Co-Tangent, and Co-Secant, are fo many Degrees as any, wants of 90°. Cycle of the Sun, is a Revolution of twenty- eight Years, in which Time the dominical Let- ters are the fame they were twenty-eight Years. before. , Cycle of the Moon, is a Revolution of nine-- teen Years, in which Time the Conjunttions: and Afpeéts of the Sun and Moon are near the: fame they were nineteen Years before: It isi alfo called the Prime, or Golden Number ; and | four of thefe Revolutions make up the callip-, pick Period, equal to feventy-fix Years; ini which Time the Afpects of the TLuminariess come to a more perfect Degree of Exattneds., Declination of the Sun, Moon, or Stars, 1ss their Diftance from the Equinoétial towards ei- ther Pole in Degrees and Minutes: The Sun’ss greateft Declination is 23° %, equal to the Obli-- guity of the Ecliptick, Depref~
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