3040 



Rays, General Theory of 



3040 



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invariants of asymmetric optical system. 

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 29 (1898) 33-. 



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 given optical path. Larmor, J. L. Mth. 



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 Contact transformations, infinitesimal, of 



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 Cotes's theorem, application. Herschel, (Sir) 



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(1809) 278-. 

 Curve of shadow for surface of revolution. 



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 Curves satisfying certain condition of maximum 



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 straight line. Grunert, J. A. Grunert 



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Focal surface of pencil traversing system of 



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 Illumination curves of skew helicoids. Schmid, 



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 Infinitesimal representations of optics. Haus- 



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 Light propagation in reflecting and refracting 



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 Lines of force and equipotential surfaces in 



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 Malus's theorem on course of luminous rays, 



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wave- surf aces, cubature. Ruchhoft, W. 

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system of 2nd order and 2nd class. Stahl, W. 

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 3 (1866) 33-. 



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32] Ir. Ac. T. 15 (1828) 69- ; 16 (1830) 4-, 

 (pt. 2) (1831) 85-; 17(1837)1-. 



297. 



