Newton's Principia, sections I, II, III, with notes and illustrations. Also a collection of problems (1863)
Newton, Isaac, Sir, 1642-1727, Frost, Percival, 1817-1898 · Cambridge, London, Macmillan and Co · leaf 128
COR. If the subtense BD be drawn A T+ TB = AB = AD, ultimately;therefore, T is, ultimately the point of bisection of AD. 90. To find the radius and chord of curvature through thepole, at any point of an equiangular spiral. Let SP, SQ be radii drawn to two points P and Q, near to … one another, let the tangents PR, QR at P and Q intersect in R,and let the normals PO, QO intersect in 0 • join OR, SR. 110 NEWTON. Then, since angles SQE, SPE are equal to two right angles,and each of the angles 0 QE, OPE is a right angle, the circlewhich passes through P, E, and Q will also pass…
Mechanics · Celestial mechanics
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