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 16
wR; VnN perpendicular to AB ; and QRK^parallel toP»Vi Then from the foregoing Propofition it ismanifeft, that a Ray of Light coming from R to the EarthatT, will appear as if it proceeded from ;;?, where the LineTm, produced,, interfeds the faid parallel Plane; and there-fore, becaufe T/« is… … (4) •two Right Angles, DSP and D«P muft be equal, alfo, totwo-Right Angles, and confequently QRm (= VnD) =J) g p __ j^i? j?^ But T n or R/;/, expreffing the Celerity ofthe Earth at T, is known to be inverfely as SD ; or, becaufeS D X J^^JE is every where the fame, diredly as F E; whereforethe…
Celestial mechanics · Calculus · Astronomy
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-335-226.webp)
