Proposition 53, Theorem 41, concerning the circular motion of fluids, from Newton's 'Principia Mathematica' (1687). The proposition posits that 'Bodies that are carried along in a vortex and return in the same orbit have the same density as the vortex and move according to the same law as the parts of the vortex with respect to velocity and direction.' The discoveries of English physicist and mathematician Isaac Newton (1642-1727) were prolific and hugely influential on science and thought. His work included the three laws of motion, the theory of gravitation, the law of cooling, the binomial theorem and the calculus.
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