Six lectures on light : delivered in America in 1872-1878 (1886)
Tyndall, John, 1820-1893 · New York : D. Appleton · leaf 42
ere desirable. A straight lath (pointing to EEFLECTION OF LIGHT. 11 the figure 5 in fig. 3) is fixed as an index perpendicularto a small looking-glass (M) capable of rotation.A beam of light is first received upon the glass and re-flected back along the line of its incidence. The indexbeing turned,…
Light
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