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Crowbar and Stone
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Description: "... a farmer with a crowbar, as shown, can move a rock which with his hands alone he could not stir." —Quackenbos 1859
Source: G. P. Quackenbos A.M. A Natural Philosophy: Embracing the Most Recent Discoveries in the Various Branches of Physics, and Exhibiting the Application of Scientific Principles in Every-day Life (New York: D. Appleton and Company, 1859) 90
Keywords: crowbar, move, rock, lever, simple, machine
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