Bhāskara's wheel

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Bhāskara's wheel was invented in 1150 by Bhāskara II, an Indian mathematician, in an attempt to create a hypothetical perpetual motion machine. The wheel consisted of curved or tilted spokes partially filled with mercury.[1] Once in motion, the mercury would flow from one side of the spoke to another, thus forcing the wheel to continue motion, in constant dynamic equilibrium.


  1. ^ Lynn Townsend White (April 1960). Tibet, India, and Malaya as Sources of Western Medieval Technology. p. 65.