Ancient knowledge

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Transparent Gearbox on a Homemade Bicycle
Transparent Gearbox on a Homemade Bicycle : 10 Steps (with Pictures) - Instructables
by Jean Baptiste Malbec in Chemins de fers touristique à voie étroite , métrique, ou normal. La "Tromobile"
Pennsylvania Railroad Rubber Tired Switchers - The PRR had a small fleet of Buckwalter electric tractors. These were rubber tired switchers used to switch the industries in tight dockside areas in Jersey City, Baltimore, and Philadelphia. These unique units were PRR Class 3/8000 and were first built in 1912 were originally battery powered and they were later re-powered with gasoline engines.
Pennsylvania R.R. #2 locomotive (dockside car pusher) Built 1920. Atlas Car & Manufacturing Company