Newton's principia, first book sections I, II, III, with notes and illustrations and a collection of problems, principally intended as examples of Newton's methods (1900)
ngcircle, the hypocycloid will become a straight line, which agreeswith the result of Art. 121, since a+ 25 = 0, and therefore theradius of curvature at every point will be infinite. THE EQUIANGULAR SPIRAL. 124. Def. The equiangular spiral is a curve which cutsall the radii drawn from a fixed point… … of the polygon ABGD ..., when the equal angles A8B^BSGj ... are indefinitely diminished, will be an equiangularspiral. 126. To find tlie length of an arc of an equiangular spiralcontained between two radii. Let a be the constant angle SAB, and let SL be the n^^ THE EQUIANGULAR SPIRAL. 127 radius…
Mechanics · Celestial mechanics
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