Complete perspective course : comprising the elementary and advanced stages of perspective, the projection of shadows and reflections, with exercises in theory and practice, also the practical application of perspective (1900)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan and co. · leaf 266
aves are generated in this ether by meansof a source of heat or light. The heat impressions are trans-mitted through the sensoiy nerves, and those of light throughthe optic nerves. The vibrations of sonorous waves move in the direction oftheir paths, while the heat and light rays vibrate… … Fio;. 167 triangular prism of glass (P), placed so that the ray of lightshall strike one of its faces obliquely, as shown, the ray oflight on passing through the prism will be refracted and dis-persed. If the light, after passing through the prism, fall ona white screen placed vertically at about 5…
Perspective
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