the director of the laboratory. proportional to the area of the opening. The rays removing these rings, the effects produced on the pupil Sensation is the state of consciousness which is by changes in the illumination of the iris can be emitted by the source of light traverse an oiled paper… … Fig. 1.—Henry's Pupilometer, Used to Determine Fig. 2.—Testing the Hearing with the Fig. 3.—Henry's Olfactometer for Measuring Audiometer. the Direct Eftect of Light on the Iris. Acuteness of Smell. Fig. 5.—Dumb-bell for the Study of Fatigue. Fig. 4.—An Experiment in Thermal Fig. 6.—Henry's…
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