Martin, L. C. (Louis Claude), Gamble, William · London, Blackie · leaf 104
COLOUR METHODS 78 The rods and cones are packed closely together, and each cone subtends an angle of about one minute at the posterior nodal point of the eye.^ It is estimated that the retina contains about three million distinct cones, and about five or six times as many rods. The rods and cones… … Fig. 3 1 . — Diagram of a Section of the Retina of the eye to different de- grees of brightness of light. The eye can work satisfactorily under a range of external con- ditions in which the general proportions of brightness of light vary as a million to one. This is far more than can possibly be…
Color photography · Color printing · Color
Internet Archive · Gerstein - University of Toronto · Public domain (published before 1931). Free to use for anything.
