1862 – Born on the 5th of March in Bradford, Pennyslvania.
1885 – He graduated from the Massachusetts Institute of Technology.
1890 – He married Effie Josephine Mackintosh.
1892 – He was Secretary of the National Geographic Society.
1902 – He was appointed Chief Engineer and Director of the U.S. Geological Survey.
1932 – He died on the 5th of July.