Copyright, Chile, proclamation [extending to citizens of Chile all benefits of act of Mar. 4, 1909, including copyright controlling parts of instruments serving to reproduce mechanically musical works, same to be effective from July 1, 1925, and providing that provisions of sec. 1 (e) shall apply only to compositions published after July 1, 1925, and registered for copyright in United States, which have not been reproduced within United States prior to Nov. 18, 1925].