February 5 – Henry R. Campbell of the Philadelphia, Germantown & Norristown Railroad patents the first 4-4-0, a steam locomotive type that will soon become the most common on all railroads of the United States.[1]
^Millard, Bailey (1924). "Andrew Smith Hallidie". History of the San Francisco Bay Region: History and Biography. Vol. 3. Chicago: American Historical Society. pp. 312–317. Retrieved 10 October 2021 – via Google Books.