“With respect to the mathematical part of optics, the curvature of the images, formed by lenses and mirrors, has been correctly investigated, and the inaccuracy of some former estimations has been demonstrated.”

— Thomas Young (scientist)

Preface
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)

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Thomas Young (scientist)28

English polymath 1773–1829

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Preface
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“The first demonstration (Disq. Arith., Arts. 125-145) which is presented by Gauss in a form very repulsive to any but the most laborious students, has been resumed by Lejeune Dirichlet in a memoir in Crelle's Journal… and has been developed by him with that luminous perspicuity by which his mathematical writings are distinguished.”

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“Anti-intellectualism … has been present in some form and degree in most societies; in one it takes the form of the administering of hemlock, in another of town-and-gown riots, in another of censorship and regimentation, in still another of Congressional investigations.”

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“An image of thought called philosophy has been formed historically and it effectively stops people from thinking.”

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“The greatest optical illusion of all is to believe that an image has only one interpretation.”

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“On the one hand, the student has been informed by some writers that the only certain way lies in the use of the entropy-function and the thermodynamic potentials; on the other hand, he is told with equal authority that the method used by the original investigators has been the consideration of cyclic processes, and that the former method is nothing but a mathematical (perhaps unnecessary) refinement of the results obtained by the latter. These extreme attitudes appear to me to be unfortunate, and more especially when one observes the physical clearness introduced by the use of cyclic processes, but at the same time remembers that most of the results obtained by separate investigators using cyclic processes had, with a great many more, previously been found by J. Willard Gibbs by means of a purely analytical method.”

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“The progress of mathematics has been most erratic, and… intuition has played a predominant rôle in it…. It was the function of intuition to create new forms; it was the acknowledged right of logic to accept or reject these new forms, in whose birth in had no part…. the children had to live, so while waiting for logic to sanctify their existence, they throve and multiplied.”

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p, 125
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