Allen, Charles Ricketson, 1862- [from old catalog] · New York, H. Holt and company · leaf 214
to be tested, the intensity of the candle Lbeing taken as 1 c. p. Substitute these values for eachcase, taking the intensity of the light to be tested as X.Average the values so obtained, and put them down ascandle-power. * Distances of L and L from rod, plus distance of rod from screen.…
Physics
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