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You searched for: “Redheffer, Charles; perpetual-motion machine of”
Results 1-4 of 4 sorted by date (ascending)
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1Robert Patterson to Thomas Jefferson, 30 November 1812 (Jefferson Papers)
Redheffer, Charles; perpetual-motion machine of [index entry] 
2Enclosure: Drawing of Charles Redheffer’s Perpetual-Motion Machine, [ca. 30 November 1812] (Jefferson Papers)
Redheffer, Charles; perpetual-motion machine of [index entry] 
3Thomas Jefferson to Robert Patterson, 27 December 1812 (Jefferson Papers)
Redheffer, Charles; perpetual-motion machine of [index entry] 
4Robert Patterson to Thomas Jefferson, 12 January 1813 (Jefferson Papers)
Redheffer, Charles; perpetual-motion machine of [index entry]