Word: retina
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Perhaps the most interesting piece of apparatus in the building is that devised and set up by Professor Bovie and Professor E. L. Chaffee '08 for the measurement of the electrical changes induced in the retina of the eye by the action of light. The minute changes in electrical potential thus induced are amplified by special electrical apparatus to such a degree as to permit the measurement and recording of a reaction produced by the briefest exposure to a source of light equivalent to only one-millionth of a candle power...
...long been known that light passing through the lens of the eye makes an image on the retina at the back of the eyeball, as on a photographic plate, and that the impulse which then carries the message from the retina along the optic nerves to the brain is in the nature of an electrical disturbance. Such men as Walter and Jolly in England and Einthoven in Holland have been able to measure coughly the intensity of this electrical impulse. They have represented its intensity by a curve, and have found that when a light is flashed upon...
...color-impulses were transmitted from the tiny "cones" on the retina to the brain has not previously been known. Professor Chaffee and Professor Bovie discovered that all impulses passing along the optic nerve are rhythmical, that they go in a series of extremely rapid pulsation's or separate impulses, and that the nature of this rhythm varies with the color of the light seen...
...ZOOLOGICAL CLUB. "The Visual Cells of the Vetebrate Retina, Mr. A. D. Howard. Room 1, fourth floor, Zoological Museum...
FRITZ V. BRIESEN, Pres.NATURAL HISTORY SOCIETY. - 797th regular meeting, at the rooms of the society, Society Building, Holmes Field, at 7.45 o'clock. Dr. G. H. Parker will address the society. Subject: "The Winking Movements of the Retina in some Crustaceans." Members of the University interested in Natural History are invited...