Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 200
touching the metaUic radiallyribbed disk attached to its center. This operation causes itto shift its position on the top, and expose the different col-ored segments in succession. Persistence of vision causesthe segments to appear as circular bands of color, whichconstantly change. When the… … Thu Chameleon Top. upon the top and touched by the finger, the colors are curi-ously blended. The tricolored disk shown at 14 is to be supportedloosely on one of the wires shown at 15. This disk, whenrevolved, yields some very pretty effects. The wires shownat 15, when inserted in the hollow top…
Physics · Lantern projection · Electric apparatus and appliances
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