In engineering work, 1876-1887. Editor of Mechanics, 1887-1890. With Yale & Towne Manufacturing Company, 1890-1895.
Travel and study in Europe, 1896. Technical editor Engineering Magazine, New York and London, 1897-1906. Editor Engineering Index, 1897-1905.
Editorial contributor to the Forum. Editor Cassier’s Magazine, 1906-1912. Construction engineering and special technical investigator.
With United States War and Navy Depts., Washington, District of Columbia, 1914-1918, specializing in military aviation and motors. Research work in Europe, headquarters London and Paris, since 1920.
Author: The Mechanical Engineer’s Reference Book, 1907. The Gas Turbine, 1910. Translator: The Constructor, a Handbook of Machine Design (from the German of F. Reuleaux), 1893.
Mathematics Self Taught (from the German of H. B. Lübsen). Has taken out many patents relating to aeroplanes, submarines, power generation and transmission.