This amusing toy cause an illusion of vision, and is made and exhiblted as follows
Cut out a small circular piece of card, To which fasten four strings. Draw on one side of it a Bacchus and on the other a butt. Then take one of the strings between the foreﬁnger and thumb of each hand, close to the card, and twist or twirl it rapidly around, and, according to which pair of strings you use, the figure will be seen in a different posltlon.
Various devices may be used for--instance a bird on the one side and a cage on the other; a tight-rope and a dancer; a body and a head; a candle and a ﬂame; a picture and a frame.
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|Cult Of Numbers|
Even as far back as Pythagoras, there was a tendency to manipulate the perceived value of numbers and measurements against the commoner toward controllable automation. This is the source of the desire in some to objectify others.