Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 528
irdappears in the cage. A still more ingenious application ofthis principle we owe to Plateau, whodescribed it in 1833, under the title ofthe.phenakistiscope; and also to Stamp-fer,who independently devised the samearrangement about the same time, andnamed it the stioboscopic disc. Thereader may,… … Fig. 249. SIGHT. 477 a piece of cardboard, and his only tools may be a sharp penknife, a pairof compasses, and a flat ruler. Let him draw on his cardboard a circle of8 in. diameter, and divide its circumference by eight equidistant points.From these radii should be drawn with the point of the…
Inventions
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