Henry Metcalfe (military officer)

Captain Henry Metcalfe (October 29, 1847 August 17, 1927) was an officer in the United States Army Ordnance Corps, inventor and early organizational theorist, known for his 1873 invention of a detachable magazine for small arms, for his work on modern management accounting, the development of the "time card" and his theory on the role of middle management.