Porto Rico. Civil government of Porto Rico, hearings oh S. 2448, to amend organic act of Porto Rico, S. 2571, to extend provisions of certain [Federal aid] laws to Porto Rico, S. 2572, to purchase grounds, erect and repair buildings for customhouses, offices, and warehouses in Porto Rico, S. 2573, to amend and reenact sec. 20, 22. and 50 of act to provide civil government for Porto Rico [relating to salaries], Feb. 16-Mar. 7, 1924.