Friedrich Harkort (February 22, 1793, Hagen - March 6, 1880), known as the "Father of the Ruhr," was an early prominent German industrialist and pioneer of industrial development in the Ruhr region.(29 December 2009). Friedrich Harkort - Vorbild und Vordenker , Derwesten.de (in German)
In 1819, he founded the first industrial workshop at Castle Wetter. An early proponent of railroads, he proposed the construction of a railway line from Cologne to Minden in 1825, which eventuated as the Cologne-Minden trunk line, completed in 1847. In 1826 he built a small test track, as a monorail following a design of the Englishman Henry Robinson Palmer.
References
Further reading Berger, Louis. Friedrich Harkort: Erinnerungen eines Enkels (1930) (in German)
(Onlinefassung)
Aloys Meister: Friedrich Harkort (1793–1880). In: Rheinisch-Westfälische Wirtschaftsbiographien, Band I. Aschendorff, Münster 1931, S. 38-72.