1Thomas Jefferson to Charles Artzt, 5 July 1812 (Jefferson Papers)
Your favor of June 22. has been duly recieved, by that I learn your application to mechanical inventions, and your progress in them. in the machines for carding, roving & spinning of cotton and wool, little is now wanting except a greater simplification. machines equally effectual for the manipulation of flax & hemp are greatly wanted, & would be worthy of your attention. you wish to find a...