Salaries and expenses: For carrying out the functions of the Secretary under the Act of June 5, 1930, as amended (7 U. S. C. 541-545), independently and in cooperation with other branches of the Government, State agencies, purchasing and consuming organizations and persons engaged in the production, transportation, marketing, and distribution of farm and food products, and for enabling the Secretary to discharges his functions as a member of the joint Great Britain-United States board known as the Combined Food Board, including the employment of persons and means in the District of Columbia and elsewhere, and the purchase of such books and periodicals and not to exceed $500 for newspapers as may be necessary in connection with this work, $420,670.