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 SEVENTIETH CONGRESS. SEss. II. Cu. 707 . 1929 . t 1627 MOUNT RUSHMORE NATIONAL MEMORIAL COMMISSION Mount Rushmore National Memorial Commission. Toward carrying into effect the provisions of the Act creating the A pe, pe1300. Mount Rushmore National Memorial Commission, approved Feb- Pro vi 0. ruary 25, 1929, fiscal years 1929 and 1930, $100,000 : Provided, That Contracts author- in addition to the amount herein appropriated the Mount Rushmore ized. National Memorial Commission is authorized to incur contractual obligations in an amount not exceeding $150,000. NATI ONAL ADV ISOR Y CO MMIT TEE FOR AERO NAUT ICS For scientific research, and so forth, including the same objects specified under this head in the Independent Offices Appropriation Act for the fiscal year 1923, $258 .17. For an additional amount for a seaplane channel and equipment for the conduct of scientific research in aeronautics at the labora- tories of the National Advisory Committee for Aeronautics as authorize d and directed by the Act o f March 3, 19 15 (U. S. C., p. 1698, sec . 151), including the same objects specified under this head in the In dependent Offi ces Appropria tion Act for the fiscal year 1929, fiscal years 1929 a nd 1930, $208 ,000. P ORTO RIC AN H URRI CANE REL IEF COMM ISSI ON For an additional amount for administrative expenses to enable the commission to carry out the provisions of Public Resolution Numbered 74, Seventieth Congress, approved December 21, 1928, to extend relief to the people of Porto Rico affected by the hurricane of September 13 and 14, 1928, $20,000, to remain available until expended : Provided, That in the expenditure of any appropriations made under such public resolution, the commission is authorized to delegate to a board of alternates, designated by the commission for that purpose, any of the powers and duties vested in the commission by such public resolution, and the acts of such board of alternates shall have the same force and effect as though performed by the commission. The commission or the board of alternates may author- ize the disbursement of funds, approved for disbursement by either of them, directly through a disbursing agent appointed or designated by the commission for that purpose, or may authorize such disburs- ing agent to advance funds to the Insular Treasury for effecting approved disbursements. PUBLIC BUILDINGS AND PUBLIC PAR KS OF THE NATIONAL CAPITAL General expenses : For an additional amount for general expenses required for the demolition of temporary building Numbered 7, at Eighteenth Street, C Street, and Virginia Avenue, Northwest, in Washington, District of Columbia, fiscal years 1929 and 1930, $5,000. General expenses, maintenance, and care of buildings : For an additional amount for general expenses in connection with the main- tenance of public buildings in the District of Columbia, including rent, and salaries for maintenance and operation of the buildings, fiscal years 1929 and 1930, $104,840. SMIT HSONIA N INSTI TUTION Nat io nal Advisory Committee for Aero- nautics. Expenses. Seaplane channel, etc. Vol.38,p.930. U.S. Code, p.1698. Ante, p.582. Porto Rican Hurri- cane Rel ief Commis - sion. Additi onal amoun t for administrative ex- penses. Ante, p. 1068. Proviso. Board of alternates to ma ke disburse- ments, etc. Publi c Buildings a nd Public Parks of the Na- tiona l Capital. Eigh teenth and C Streets NW. Re moval of te mpo- rary building No. 7, at. Care of buildings, etc. Smithsonian Institu- tion. Astrophysical Observatory : For amount required to pay duty Se tr y hysical Oh. assessed on special scientific apparatus imported for the use of the Astrophysical Observatory, fiscal year 1926, $658 .75. 54835 ° -29-PT 1-106