Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 35
refracted at the point of incidence I, and approaches thenormal CI. At the point of emergence it is also refracted, but divergesfrom the normal GC, so that it is twice refracted in a direction whichmoves it from the axis CC. Since the same conditions obtain forevery other ray, SKMN, it follows that…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.