quires the shortest time.” Feynman, using elementary relations from high school geometry, proved that the /east time principle could lead directly to Snell’s law of the refraction of light at the interface of two different conducting media such as air and water. His analogy was the optimal choice of the

he same tolls and enjoy the same privileges" as other companies incorporates the law governing tolls and privileges as it exists at any given moment. Snell v. Chicago, 133 Ill. 413, 437-439, 24 N. E. 532, 537 (1890). In contrast, a statute that refers to another statute by specific title or section numbe

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