1916 (39 Statutes at Large, 619), by an act approved February 17, 1917 (39 Statutes at Large, 922), by an act approved March 2, 1917 (39 Statutes at Large, 951), by an act approved May 29, 1917 (40 Statutes at Large, 101), by an act approved August 9, 1917 (40 Statutes at Large, 270), by an act approved August 10, 1917 (40 Statutes at Large, 272), and by an act approved February 28, 1920 (41 Statutes at Large, 456)..............