L-ROOM. 53 knowa and the device of the rotating disks used as a curious experiment, but its practical utUity has in recent years been greatly enhanced by a very simple improvement made by J. Clerk Maxwell. He merely cut a slit from the circumference to the center of the disk, and thus was able to… … Pjq i_ ant to the eyes, and no well- defined color. Consequently unless the speed named above is secured no satisfactory results can be obtained in color work. Fig. 2 represents in perspective two disks partially put to- gether, showing clearly the method of uniting them. Fig. 3 is a face view of…
Color
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