1Thomas Jefferson to John Coskery, 26 April 1822 (Jefferson Papers)
Your letter of the 6 th has been recieved, but age has long obliged me to relieve my mind from speculations of difficulty . I have not perfectly comprehended the principles of the improvement you propose in the construction of the stove; but such advances have been made in latter times in the economising of fire, as to expect that beneficial improvements may still be made, and altho I am...