John Deere’s Steel-Tipped Plow and Cyrus McCormicks’s Mechanical Reaper – Deere invented a steel-tipped plow that halved the labor to clear acres to till. Timber for housing and fencing was available in nearby woods, and settlements spread rapidly. McCormick developed the mechanical reaper which harvested grain seven times faster than traditional methods with half the work force and guaranteed that wheat would dominate the Midwestern prairies.
American System of Manufacturing, or Interchangeable Parts – Europeans had started to refer to manufacture by interchangeable parts as the “American System of Manufacturing.” The system had many advantages. Traditionally, damage to any part of something ruined the whole thing and no new part would fit. With interchangeable parts, however, replacement parts could be obtained and mass production also occurred.
Samuel F. B. Morse – Morse was an American inventor. He contributed to the invention of a single-wire telegraph system bases on European telegraphs. He was also co-inventor of the Morse code, and also an accomplished painter.
Catharine Beecher, A Treatise on Domestic Economy – In her widely popular Treatise on Domestic Economy, Beecher told women that technological advances made it their duty to make every house a “glorious temple” by utilizing space more efficiently.
Contagion Theory versus Miasma Theory – The inability of physicians to explain the diseases led to these theories. No one understood that bacteria cause cholera and yellow fever. The contagion theory was that epidemic diseases were spread by touch, whereas the miasmas theory was it resulted from air carried gases from rotten vegetation or dead animals. But neither theory worked.
Crawford Long and William T. G. Morton – Long employed sulfuric ether during a surgical operation. Long failed to follow up on his discovery, but four years later, Morton, a dentist,