Tagged with 'improvement'

Polygraph

Artist/Maker: John Isaac Hawkins (1772-1855); Charles Willson Peale (1741-1827)[1] Created: 1806 Footnotes1. This article is based on Stein, Worlds, 368.

Moldboard Plow

Jefferson had an abiding interest in improving the technology of farming. One of his more important contributions to agriculture was the "mouldboard of least resistance" for a plow.[1]