Martin, L. C. (Louis Claude), Gamble, William · London, Blackie · leaf 126
ve a means of equalizing intensity and thus measuring the relative intensities of the illumination on the face AB, due to the two sources, in any part of the spectrum. The angular position of Gg is indicated by a divided circle and pointer. The law of the variation of the intensity of the light… … Fig. 44. — The Nutting Spectrophotometric Attachment for a Spectroscope A convenient form of this apparatus is made up by Messrs. A. Hilger, Ltd. It is arranged in a slightly different form, so that the same source may illuminate both apertures, when the instrument may be employed to measure the…
Color photography · Color printing · Color
Internet Archive · Gerstein - University of Toronto · Public domain (published before 1931). Free to use for anything.
