PUBLIC LAWS-C('H. 404-JUNE 16, 1938 Public-lands high- ways. t PUBLIC-LANDS HIGHWAYS Survey, construc- For the survey, construction, reconstruction, and maintenance of main roads through unappropriated or unreserved public lands, non- taxable Indian lands, or other Federal reservations other than the 46 Stat. 0 3. forest reservations, under the provisions of the Act of June 24, 1930 . (23 U. S. C. 3), $2,500,000, to be immediately available and to remain available until expended, which sum is the amount authorized for the 49 Stat. 1520 . fiscal year 1939 by section 3 of the Act approved June 16, 1936 (49 Stat. 1520). Total, Bureau of Public Roads, $187,500,000. Bureau of Agricul- tural Engineering. Salaries and ex- penses. General administra- tive expenses. Agricultural engi- neeringinvestigations. Cotton ginning in- vestigations. 46 Stat. 148. 7 U. S. C.5§ 424,425. Personal services. Personal services, D.C . Vehicles for field work. Bureau of Agrict:l- tural Economics. Salariesandex- penses. BUREAU OF AGRICULTURAL ENGINEERING SALARIES AND EXPENSES General administrative expenses: For necessary expenses for gen- eral administrative purposes, including the salary of Chief of Bureau and other personal services in the District of Columbia, $37,600. Agricultural engineering investigations: For investigations, experi- ments, and demonstrations involving the application of engineering principles to agriculture, independently or in cooperation with Fed- eral, State, county, or other public agencies or with farm bureaus, organizations, or individuals; for investigating and reporting upon the utilization of water in farm irrigation and the best methods to apply in practice; the different kinds of farm power and appliances; the flow of farm water in ditches, pipes, and other conduits; the duty, apportionment, and measurement of farm irrigation water; the cus- toms, regulations, and laws affecting farm irrigation; snow surveys and forecasts of farm irrigation water supplies, and the drainage of farms and of swamps and other wet lands which may be made avail- able for agricultural purposes; for preparing plans for the removal of surplus farm water by drainage; for developing equipment for farm irrigation and drainage; for investigating and reporting upon farm domestic water supply and drainage disposal, upon the design and construction of farm buildings and their appurtenances and of buildings for processing and storing farm products; upon farm power and mechanical farm equipment and rural electrification; upon the engineering problems relating to the processing, transportation, and storage of perishable and other agricultural products; and upon the engineering problems involved in adapting physical character- istics of farm land to the use of modern farm machlinery; for investi- gations of cotton ginning under the Act approved April 19, 1930 (7 U. S. C . 424, 425); for giving expert advice and assistance in agricultural engineering; for collating, reporting, and illustrating the results of investigations and preparing, publishing, and distribut- ing bulletins, plans, and reports; including the employment of per- sons and means in the District of Columbia and elsewhere, and not to exceed $10,000 for construction of buildings, $472,400. Total, Bureau of Agricultural Engineering, $510,000, of which amount not to exceed $185,955 may be expended for personal services in the District of Columbia, and not to exceed $4,375 shall be avail- able for the purchase of motor-propelled and horse-drawn passenger- carrying vehicles necessary in the conduct of field work outside the District of Columbia. BUREAU OF AGRICULTURAL ECONOMICS SALARIES AND EXPENSES For the employment of such persons and means in the city of Washington and elsewhere as may be necessary in conducting investi- gations, experiments, and demonstrations as follows: 738 [52 STAT. I
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