Color-vision and color blindness, a practical manual for railroad surgeons (1920)
Jennings, John Ellis · Philadelphia F.A. Davis · leaf 97
l line so overlap each other as tocover the image formed by those colorless rays. A lessluminous spectrum, by diminishing the color-sensations 8i COLOR-YISIOX AND COLOR-BLINDNESS. produced on each side of the neutral line, wliich in allcases are described as feeble, permits of the impressionof a… … Fig. 2i}.—Mitscherlichs Polariscope. seen in the spectrum, and thus reproduce the entirespectrum. Polarlscope.—The polariscope (see Fig. 20) consistsessentially of two parts: a quartz plate for polarizing thelight (])olarizer) and a Nicol prism for exliibiting tliefact of light having undergone…
Color-blindness · Eye
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