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 214 Services in the Dis- trict. Sci enti fic in ves tig a- tions for Departments, etc ., by the Bureau. Transfer of funds to credit of Bureau. Proviso. Exp enditure of funds t ransferred. Open market c hases of minor sup- plies, etc. R. S., sec. 3709, p. 733. V.S . C., p. 1309. P urcha se of books , etc . A ttend ance u po n meetings. Depar tment of Labor. Com missi oners Conciliation . Vol 37 p.730. U.S. L.,p. 61. p ur- SEVENTY-FIRST CONGRESS. SEss. II. CH. 184. 1930 . reports of the mineral resources of the United States, including special statistical inquiries ; statistical studies and reports relating to mine accidents ; and including personal services in the District of Columbia and elsewhere ; purchase of furniture and equipment ; stationery and supplies ; typewriting, adding, and computing mac hines, acce ssorie s and repa irs ; newspap ers ; tr avelin g exp enses ; purchase, not exceeding $1,200, operation, maintenance, and repair of motor-propelled passenger-carrying vehicles ; and for all other necessary expenses not included in the foregoing, $307,600, of which amo unt no t to exceed $245 ,000 may be expe nded f or pe rsona l serv ices in the District of Columbia ; During the fiscal year 1931 the head of any department or inde- pendent establish ment of t he Governm ent having funds available for scientific investigations and refining cooperative work by the Bureau of Mines on scientific 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 Secre- tary of Commerce, transfer to the Bureau of Mines such sums as may be necessary to carry on such investigations. The Secretary of the Treasury shall transfer on the books of the Treasury Depart- ment any sums which may be authorized hereunder, and such amounts shall be placed to the credit of the Bureau of Mines for the performance of work for the department or establishment from which the transfer is made : Provided, That any sums transferred by any department or independent establishment of the Government to the Bureau of Mines for cooperative work in connection with this appropriation may be expended in the same manner as sums appro- priated herein may be expended ; The purchase of supplies and equipment or the procurement of services for the Bureau of Mines, at the seat of government, as well as in the field outside of the District of Columbia, may be made in open market without compliance with section 3709 of the Revised Statutes of the United States, in the manner common among busi- ness men, when the aggregate amount of the purchase or the service does not exceed $100 in any instance ; For the purchase or exchange of professional and scientific books, law books, and books to complete broken sets, periodicals, directories, and other books of reference relating to the business of the Bureau of Mines, there is hereby made available from any appropriations made for such bureau not to exceed $3,500 ; For necessary traveling expenses of the director and employees of the bureau, acting under his direction, for attendance upon meet- ings of technical, professional, and scientific societies, when required in connection with the authorized work of the Bureau of Mines and incurred on the written authority of the Secretary of Commerce, there is hereby made available from any appropriations made to the Bureau of Mines not to exceed in all $3,000 ; To tal, B ureau of M ines, $2,54 9,480. TITLE IV .-DEPARTMENT OF LABOR OFFICE OF THE SECRETARY Se creta ry, As sist- Salaries : Secretary of Labor, $15,000 ; Assistant Secretary, Second ants, and office pe r- sonnel. Assistant Secretary, and other personal services in the District of Columbia, $104,760 ; in all, $20 9,7 60. of Commissioners of conciliation : To enable the Secretary of Labor to exercise the authority vested in him by section 8 of the Act creat- ing the Department of Labor (U . S . (~ ., title 5, sec. 611) and to

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