Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 338
Fig. 372.—Anotherform of total-re-flection prism. COLLADONS FOUNTAIN OF FIRE 327 This principle is also used in one form of the so-called Lnxfer prisms, two patterns ofwhich are shown in Fig. 373.They are firmly fastened in ironframes which are lot into the pave-ment. The sky-light enters… … Fia. 373.—Luxfer prisms, use-ful in lighting basements.
Physics
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