Well's natural philosophy : for the use of schools, academies and privte students, introducing the latest results of scientific discovery and research ; arranged with special reference to the practical application of physical science to the arts and the experiences of everyday life ; with three hundred and seventy-five engravings (1873)
Wells, David A · New York : Ivison, Blakeman, Taylor and Co. · leaf 307
ry particle the atmosphere of air is a luminous center, which radiates light in every direc- upon the diffu- tj^Q^ -^g^g j^ not for this, the suns light would only illumi-Bion of light? ° • nate those spaces which are directly accessible to its rays, and darkness would instantly succeed the… … Mirrors are divided into three general classes,without regard to the material of which they con-sist, viz.. Plane, Concave, and Convex Mirrors. These three varieties of mirrors are represented in Fig.233; A, being plane, like an ordinary looking-glass; B,concave, like the inside of a watch-glass;…
Physics · Science · Technology
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