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 in their work; travel, and other incidental expenses of employees in attendance at meetings and conferences held for promoting safety Contributions. and health in the coal-mining industry, $722,880: Provided, That the Secretary, acting through the Director of the Bureau of Mines, is hereby authorized to accept buildings, equipment, and other contribu- tions from public or private sources. Enforcement of Federal Explosives Act: For all necessary expenses of the Bureau of Mines in performing the duties imposed upon it by 55 stat. u83. the Federal Explosives Act, including not to exceed $100,000 for II §§121-142. personal services in the District of Columbia; books of reference. periodicals, and newspapers; not to exceed $11,250 for printing and binding; contract stenographic reporting services; supplies and equip- ment; traveling expenses; maintenance, repair, and operation of passenger-carrying automobiles; purchase of special wearing apparel or equipment for the protection of employees while engaged in their work; purchase in the District of Columbia and elsewhere of other Ante, p. 463. items otherwise properly chargeable to the appropriation "Contingent expenses, Department of the Interior"; $530,000: Provided, That sec- 41 U.. c.C. tion 3709, Revised Statutes shall not apply to any purchase or service rendered under this appropriation when the aggregate amount involved Oooperation with does not exceed $300: Provided further, That the Secretary, through the Director of the Bureau of Mines, is hereby authorized to carry out projects hereunder in cooperation with other departments or agencies of the Federal Government, the District of Columbia, States, Terri- tories, insular possessions, with other organizations or individuals, and with foreign countries and the political subdivisions thereof. Protection of mineral resources and facilities (national defense): For all expenses necessary to enable the Bureau of Mines, independ- ently or in cooperation with other agencies, public or private, to initiate and augment measures to prevent subversive activities from interfering with the extraction and processing of minerals, including not to exceed $30,000 for personal services in the District of Columbia; Vehicles. purchase (not to exceed $4,500), maintenance, operation, and repair of passenger-carrying automobiles; travel expenses, including expenses of attendance at meetings of organizations concerned with the furtherance of the purposes hereof; not to exceed $3,250 for printing and binding; purchase of special apparel and equipment for the protection of employees while engaged in their work; and purchase in the District of Columbia and elsewhere of other items AnteP.s otherwise properly chargeable to the appropriation "Contingent expenses, Department of the Interior", $400,000. , p.23. Testing fuel: To conduct inquiries and scientific and technologic investigations concerning the mining, preparation, treatment, and use of mineral fuels, and for investigation of mineral fuels belonging to or for the use of the United States, with a view to their most Recommendations efficient utilization; to recommend to various departments such changes to Government agencies. in selection and use of fuel as may result in greater economy, and, upon request of the Director of the Bureau of the Budget, to investi- gate the fuel-burning equipment in use by or proposed for any of the departments, establishments. or institutions of the United States in the District of Columbia, $375,000. of which not to exceed $63,500 . ieamg may be expended for personal services in the District of Columbia. vestigations - Mineral mining investigations: For scientific and technolooic investigations concerning the mining, preparation, treatment, and utilization of ores and mineral substances, other than fuels, with a view to improving health conditions and increasing safety. efficiency, and economy in the mining, quarrying, metallurgical, and other mineral industries; including all equipment, supplies, expenses of travel, purchase, not to exceed $12,000, operation, maintenance, 480 PUBLIC LAWS--CH. 219-JULY 12, 1943 [57 STA.T.

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