Elementary treatise on physics experimental and applied for the use of colleges and schools (1890)
Ganot, A. (Adolphe), 1804-1887, Atkinson, E. (Edmund) · New York : W. Wood · leaf 511
een that there is no difference in brightness between thegreased part and the rest of the screen. By measuring the distances ofthe lights from the screen by means of the scale, their relative illuminatingpowers are resj)cctively as the squares of their distances from the screen. The difficulty of… … -510] Relative Intensities of Various Sources of LigJit. 493 20 volumes of air, at the rate of half a cubic foot in an hour, in a speciallyconstructed burner so as to produce a flame of a definite height. This hasbeen found to answer well in practice. By this kind of detemiination thedegree of…
Physics
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