The physiology of vision with special reference to colour blindness (1920)
Edridge-Green, Frederick William, 1863- · London, G. Bell and sons · leaf 163
PHYSIOLOGY OF VISION 148 Clear apertuie of collimator and telescope object glasses =1^" (22 mm.). Fig. 20. Slit, 7 mm. effective length, of jaw, with wedge for reducing the effective length of the sHt, protective cap, comparison prism, and screw adjustment for the slit width with divided head (see… … Fig. 21. {0-6 x actual size.)
Color vision · Vision · Color blindness · Refraction · Ophthalmology
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