[56 STAT. PUBLIC LAWS-CH. 473-JULY 2, 1942 38 Stat. 959. Buildings and grounds, Pittsburgh and Bruceton, Pa. Investigation of do- mestic sources of min- eral supply. Provso. Investigation of raw material resources for western steel produc- tion. Mining experiment stations: For the employment of personal serv- ices, purchase of laboratory gloves, goggles, rubber boots, and aprons, the purchase not to exceed $3,000, exchange as part payment for, maintenance and operation of motor-propelled passenger-carrying vehicles for official use in field work, and all other expenses in connec- tion with the establishment, maintenance, and operation of mining experiment stations, as provided in the Act authorizing additional mining experiment stations, approved March 3, 1915 (30 U. S . C . 8), $551,795, of which appropriation not to exceed $17,625 may be expended for personal services in the District of Columbia; Buildings and grounds, Pittsburgh, Pennsylvania: For care and maintenance of buildings and grounds at Pittsburgh and Bruceton, Pennsylvania, including personal services, the purchase, exchange as part payment for, operation, maintenance, and repair of passenger automobiles for official use, and all other expenses requisite for and incident thereto, including not to exceed $10,000 for additions and improvements, $115,400; Economics of mineral industries: For inquiries and investigations, and the dissemination of information concerning the economic prob- lems of the mining, quarrying, metallurgical, and other mineral industries, with a view to assuring ample supplies and efficient distri- bution of the mineral products of the mines and quarries, including studies and reports relating to uses, reserves, production, distribution, stocks, consumption, prices, and marketing of mineral commodities and primary products thereof; preparation of the reports of the mineral resources of the United States, including special statistical inquiries; and including personal services in the District of Columbia and elsewhere; purchase of furniture and equipment; stationery and supplies; typewriting, adding and computing machines, accessories and repairs; newspapers; traveling expenses; purchase, not exceeding $1,200, exchange as part payment for, operation, maintenance, and repair of motor-propelled passenger-carrying vehicles for official use in field work; and for all other necessary expenses not included in the foregoing, $455,330, of which amount not to exceed $300,000 may be expended for personal services in the District of Columbia; Investigation of domestic sources of mineral supply (national defense) : For every expenditure requisite for and incident to the work of the Bureau of Mines in investigating domestic sources of mineral supply, including the purchase of professional and scientific books; not to exceed $1,500 for printing and binding; purchase not to exceed $22,000, exchange as part payment for, operation, maintenance, and repair of motor-propelled passenger-carrying vehicles for official use in field work and in transporting employees between their homes and temporary locations where they may be employed; purchase of goggles, gloves, rubber boots, miners' hats, aprons, and such other articles of personal wearing apparel or equipment as may be required for the protection of employees while engaged in their work; the construction, maintenance, and repair of necessary camp buildings and mining structures and appurtenances thereto; and including not to exceed $31,000 for personal services in the District of Columbia, $651,265: Provided, That section 3709 of the Revised Statutes (41 U. S . C . 5) shall not be construed to apply to this appropriation; Investigation of raw material resources for western steel production (national defense): For all expenses necessary to enable the Bureau of Mines to investigate by subsurface exploration the amount and quality of iron ores, limestone, and coking coals essential to expanding steel production in States in which such deposits may exist, including all necessary laboratory research; preliminary examination and sub- surface exploration of raw materials; supplies and equipment; 542
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