on the retina. This is the phenomenon known among coated with collodion, the sensitive part is a hollow sphere, physicists by the name of persistence of vision. To illus- covered with a delicate network of nerve structure, called trate this property, which was soon to be employed in eluci- the… … to obtaining the blending of colors upon the retina, by pre- Fig. 2 shows the layers of the human retina magnified 400 Similarly red and green disks of light, thrown on the senting them in quick succession to the eye. Professor Rood's times. There are no less than ten of them, all of which, screen,…
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