Note 37 — Chapter I

Letters to Leibnitz, “Dictionnaire des Inventions,” Migne’s N. Encycl., Paris, 1852, vol. xxxvi., art. “Vélocipèdes,” p. 317. Thomas Newcomen was a working blacksmith in the town of Dartmouth (Devon). He was assisted in his inventions by John Calley, a glazier of the same place, with whom he subsequently entered into partnership, and erected more than one engine which successfully pumped water from mines.