The color sensitivity of the peripheral retina (1905)
Baird, John Wallace, 1869-1919 · Washington, D.C., Carnegie Institution of Washington · leaf 48
e from the fixation-lantern ; its distance from the eye of the observer therefore remains constant and equal to that of the fixation-lantern. The quadrant is graduated, so that the setting of the movable lantern may be read off conveniently. The quadrant also carries at its axis a graduated metal… … Perimeter Employed in Present Investigation. A, head-rest and eye-shield; BE, graduated steel quadrant with counter-weight; the quad¬ rant revolves upon an axis at E. D, movable lantern carrying the stimulus-color; E, stationary fixation-lantern; E, circular patch of stimulus-color; H, fixation…
Color vision · Vision
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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