1769-1848) 1909- 1917-1997 archimedes augustinde bentele biography béthencourtymolina electricpowerproduction gerhard germany history historygeneralelectriccompany industrialists inventors james(ingenieur kopernikus max mechanicalengineering mechanismus(maschinendynamik) neumann nikolaus rural ruralconditions ruralelectrification technik unitedstates water-supply watt windmills