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You searched for: “wheels and axles”
Results 1-3 of 3 sorted by date (ascending)
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1Thomas Jefferson to William Thornton, 14 January 1812 (Jefferson Papers)
...to describe the mechanical power or elementary machine called the wheel and axle (
2Rodolph Schaer to Thomas Jefferson, 25 March 1819 (Jefferson Papers)
scientific instruments; wheels and axles [index entry]  wheels and axles [index entry] 
3Edmund Bacon to Thomas Jefferson, 16 July 1820 (Jefferson Papers)
wheels and axles [index entry]