Ad: Water Screw Perpetual Motion Machine Woodcut Pacifier
No need to be a physicist to enjoy any of these aspiring thermodynamic gifts featuring Robert Fludd's 1618 "water screw" perpetual motion machine from a 1660 wood engraving. Gifts include the following title of "Water Screw" Perpetual Motion Machine with the following caption: "Note: There can never be a perpetual motion machine since it would violate one or both of the first & second law of thermodynamics". Make others do a double-take at the earliest concept of a perpetual motion machine with any of these woodcut illustration gifts! myPhysics
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