A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams (1829)
Curtis, Thomas, fl. 1820 · London : Thomas Tegg · leaf 208
ere 518,385 toises in height,we sliould have no light from the sun, even inhis meridian splendor. It has been estimatedthat, of the horizontal sun-beams passing throughabout 200 miles of air, ^\^\h part only reachesus. 44. The nature of Refu ACTION will be fully dis-cussed under that department of… … dium of water, or plain glass. Ti)e ray C Dfalling obliquely on the surface of the mediumB, is bended at D, and goes on in the directionD ¥.. But the ray FG, falling perpendicularlyon the surface of the medium B, goes on in thesame straight direction U II. 4.1. Light, in passing within a certain…
Encyclopedias and dictionaries · Aeronautics
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