An American text-book of physiology . A B Fig. 242.—Disks to illustrate the varying rate at which colors rise to their maximum of sensation. ward or inward over the retinal surface appears bordered with colors whichvary with the rate of rotation of the disk and with the amount of exhaustionof the retina. Chromatic effects due to a similar cause are also to be seenwhen a disk, such as is shown in Figure 242, B (known as Benhams spectrum 790 AX AMEIUCAX TEXT-BOOK 01 JJIYSJOLOG Y. top), is rotated with moderate rapidity. The eoncentric bands of color appearin reverse order Aviien the direction of
An American text-book of physiology . A B Fig. 242.—Disks to illustrate the varying rate at which colors rise to their maximum of sensation. ward or inward over the retinal surface appears bordered with colors whichvary with the rate of rotation of the disk and with the amount of exhaustionof the retina. Chromatic effects due to a similar cause are also to be seenwhen a disk, such as is shown in Figure 242, B (known as Benhams spectrum 790 AX AMEIUCAX TEXT-BOOK 01 JJIYSJOLOG Y. top), is rotated with moderate rapidity. The eoncentric bands of color appearin reverse order Aviien the direction of rotation is reversetl. The ap])arentmovement of colored figures on a background of a different color when theeve moves rapidly over the object or the object is moved rapidly befefore the eyes. The redfigures will appear to
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Keywords: ., bookautho, bookcentury1800, bookdecade1890, booksubjectphysiology
