The physiology of vision with special reference to colour blindness (1920)
Edridge-Green, Frederick William, 1863- · London, G. Bell and sons · leaf 164
THE COLOUR SENSE 149 shutters with vertical edges ; the shutters being carried by levers which rotate about centres near the object glass of the telescope. The shutters can be moved into the field from right and left respectively, each by its own micrometer screw, and to each screw is attached a… … region of the spectrum from Wave-length 5320 to Wave- length 5950 is exposed to view in the eyepiece. An adjustment for the shutters is provided in case of possible zero alterations in course of time. These adjustments (which are provided for each shutter, inde- pendently) are reached by unscrewing…
Color vision · Vision · Color blindness · Refraction · Ophthalmology
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
