1Thomas Jefferson to Robert Patterson, 27 December 1812 (Jefferson Papers)
After an absence of five weeks at a distant possession of mine to which I pay such visits three or four times a year, I find here your favor of Nov. 30. I am very thankful to you for the description of Redhefer’s machine. I had never before been able to form an idea what his principle of deception was. he is the first of the inventors of perpetual motion, within my knolege, who has had the...