Essays on several curious and useful subjects, in speculative and mix'd mathematicks : illustrated by a variety of examples (1740)
Simpson, Thomas, 1710-1761, Adams, John, 1735-1826, former owner. BRL, John Adams Library (Boston Public Library) BRL · London : Printed by H. Woodfall, jun. for J. Nourse ... · leaf 320
eorems, the Value of bk-=^ulmuft be politive. An ( 55 ) An INVESTIGATION of the Curve defcribed by theShadow oj an ObjeB on the Plane of the Horizon^ accordingto any given Declination of the Sun, and Elevation of theFole. Let fARHT be the Plane of the Horizon, P^the perpen-dicular Height of the… … tion : Then, fince all the Rays intercepted at P, during onewhole apparent, diurnal Revolution of the Sun (fuppofmg theDeclination to continue invariable) make Angles with the EarthsAxis or PB/equal to (BPF) the faid Complement of Decli«nation, it is plain, that if thofe Rays had proceeded on…
Celestial mechanics · Calculus · Astronomy
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