326 PUBLIC LAWS--CH. 187-MAY 9, 1938 [52 STAT. Power Commission, $105,000, of which amount not to exceed $60,000 may be expended for personal services in the District of Columbia; Printing and bind- Printing and binding, and so forth: For printing and binding, g, et $120,000; for preparation of illustrations, $25,000; and for engraving and printing geologic and topographic maps, $120,000; in all, $265,000; Mineral leasing. Mineral leasing: For the enforcement of the provisions of the Acts 38Stat.742;4 Stat. of October 20, 1914 (48 U. S. C. 435), October 2, 1917 (30 U. S . C. 48U.S. . § 436, 141), February 25, 1920 (30 U. S . C . 181), as amended, and March 4, 844130U. C . 141, 1921 (48 U. S. C. 444), and other Acts relating to the mining and recovery of minerals on Indian and public lands and naval petroleum reserves; and for every other expense incident thereto, including supplies, equipment, expenses of travel and subsistence, the construc- tion, maintenance, and repair of necessary camp buildings and appur- tenances thereto, $315,000, of which amount not to exceed $65,000 may be expended for personal services in the District of Columbia; onopienrtiivetcwork During the fiscal year 1939 the head of any department or inde- vestigations 'for i- pendent establishment of the Government having funds available for agencies scientific and technical investigations and requiring cooperative work by the Geological Survey on scientific and technical investigations within the scope of the functions of that bureau and which it is unable to perform within the limits of its appropriations may, with the approval of the Secretary of the Interior, transfer to the Geologi- cal Survey such sums as may be necessary to carry on such investi- Credit of funds. gations. The Secretary of the Treasury shall transfer on the books of the Treasury Department any sums which may be authorized hereunder, and such amounts shall be placed to the credit of the Geological Survey for the performance of work for the department xpenditure o or establishment from which the transfer is made: Provided, That transered funds. any sums transferred by any department or independent establish- ment of the Government to the Geological Survey for cooperative work in connection with this appropriation may be expended in the same manner as sums appropriated herein may be expended: Provided avCbmttivof wfk; further, That any funds herein appropriated for the Geological Sur- vey for cooperative work may be utilized prior to July 1, 1938, as required to enable the Geological Survey to continue its cooperative work pending reimbursement from cooperative agencies, the amount so utilized to be repaid to the appropriation from which advanced; AormialpPhoegtaphs During the fiscal year 1939, upon the request of the Secretary of the Interior, the Secretary of War or the Secretary of the Navy is authorized to furnish aerial photographs required for mapping projects, insofar as the furnishing of such photographs will be economical to the Federal Government and does not conflict with military or naval operations or the other parts of the regular train- ing program of the Army, Navy, and Marine Corps flying services, and the Secretary of the Interior is authorized to reimburse the War or Navy Department for the cost of making the photographs, such cost to be confined to the actual cost of gasoline, oil, film, paper, chemicals, and the labor performed in developing the photo- graphic negatives and the printing of copies of photographs, and the per diem expenses of the personnel authorized by law, together with such incidental expenses as care and minor repairs to plane and transportation of personnel to and from projects, and the War Department or the Navy Department, on request of the Department of the Interior, is authorized to furnish copies to any State, county, or municipal agency cooperating with the Federal Government in Contracts with ci- the mapping project for which the photographs were taken. In the . event that the Director of the Geological Survey deems it advan- tageous to the Government, the Geological Survey is authorized to
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