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635 cheapest to use; and is also hereby authorized to designate for the exclusive use of the United States, if in his judgment such means is best and cheapest, such site or sites, upon any navigable or nonnavigable r i \ e r or rivers or upon the public lands, as in his opinion will be necessary for national defense; and is further authorized to construct, maintain, and operate, at or on any site or sites so designated, dams, locks, improvements to navigation, power houses, and other plants and equipment or other means than water power as in his judgment is the best and cheapest, necessary or convenient for the generation of electrical or other power and for the production of nitrates or other products needed for munitions of war and useful in the manufacture of fertilizers and other useful products. (b) The President is authorized to lease, buy, or acquire, by condemnation, gift, grant; or devise, such lands and rights of way as may be necessary for the construction and operation of such plants, and to take from any lands of the United States, or to buy or acquire by condemnation materials, minerals, and processes, patented or otherwise, necessary for the construction and operation of such plants and for the manufacture of such products. (c) The products of such plants shall be used by the President for military and naval purposes to the extert that he may deem necessary, and any surplus which he shall determine is not required shall be sold and disposed of by him under such regulations as he may prescribe.. (d) The President is hereby authorized to employ such officers, agents, or agencies as may in his discretion be necessary to enable him to carry out the purposes herein specified, and to authorize and require such offic2rs, agents, or agencies to perform any and all of the duties imposed upon him by the provisions hereof. (e) The plant or plants provided for under this section shall be constructed and operated solely by the Government and not in conjunction with any other industry or enterprise carried on by private capital. R E T I K E D GRADE FOR CERTAIN GENERAL OFFICERS SEC. 38. The President, by and with the advice and consent of the Senate, may in his discretion extend the privilege granted by sections 3962(a) and 8962 (a) of title 10, United States Code, to officers, heretofore or hereafter retired, who served in the grade of general or lieutenant general after December 7, 1941, and before July 1, 1946. A D D I T I O N A L SERVICE CREDITABLE TO CERTAIN REGULARS SEC. 39. In addition to service with which he may be credited under section 1208(a)(2) of title 10, United States Code, a member of a regular component of the armed forces shall be credited, for the purposes of chapter 61 of title 10, United States Code, with all service as— (1) a cadet at the United States Military Academy, if appointed before August 24, 1912; (2) a midshipman at the United States Naval Academy, if appointed before March 4, 1913;
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