63 STAT.] 81ST CONG. , 1ST SESS.-CH. 279-JUNE 29, 1949 of Columbia when employed by any of the executive departments or independent establishments of the United States Government. Hereafter, no part of the appropriations made for the public schools of the District of Columbia shall be used for the free instruction of pupils who dwell outside the District of Columbia. PUBLIC LIBRARY For expenses necessary for the operation of the Public Library, including extra services on Sundays and holidays; newspapers, books, periodicals, and other printed material, including payment in advance for subscription thereto; music records, sound recordings, and educa- tional films; alterations, repairs; fitting up buildings; care of grounds; and rent of suitable quarters for branch libraries in Anacostia and Woodridge without reference to section 6 of the District of Columbia Appropriation Act, 1945; $1,212,000: Provided, That the disbursing officer of the District of Columbia is authorized to advance to the librarian of the Public Library, upon requisition previously approved by the Auditor of the District of Columbia, not exceeding $50 at the first of each month, for the purchase of certain books, pamphlets, periodicals, or newspapers, or other printed material. The unexpended balances of the amounts made available by the District of Columbia Appropriation Act, 1940, for the preparation of plans and specifications for the new central building of the Public Library of the District of Columbia shall remain available for the same purposes and under the same conditions and limitations until June 30, 1950. RECREATION DEPARTMENT Operating expenses: For expenses necessary for operation and main- tenance of recreation facilities in and for the District of Columbia, $1,189,000. Capital outlay: For improvement of various recreation units, including erection of recreation structures, preparation of architec- tural and landscape architectural plans, and reimbursement to the United States of funds advanced in compliance with section 501 of the Act of October 3, 1944 (58 Stat. 791), $180,000. The disbursing officer of the District of (olullbia is authorized to advance to the superintendent of recreation, upon requisitions previ- ously approved by the auditor of the District of Columbia and upon such security as the Commissioners may require of said superintendent, sums of money to be used for the expense of conducting activities of the Recreation Board under the trust fund created by the Act of April 29, 1942, the total of such advancements not to exceed $2,000 at any one time. METROPOLITAN POLICE For expenses necessary for the Metropolitan Police, including pay and allowances; one inspector who shall be property clerk; the present acting sergeant in charge of police automobiles with the rank and pay of sergeant; the present sergeant in charge of the police radio station with the rank and pay of lieutenant; the present sergeant in charge of purchasing and accounts with the rank and pay of lieu- tenant; the lieutenant assigned as harbor master with the rank and pay of captain; corporals at $3,669 per annum each; technicians with basic salary increase of $325 per annum each; not to exceed four detectives in the salary grade of captain; probational detectives with basic salary increase of $163 per annum each; compensation of civilian 309 Free instruction of pupils outside D. C . 58 Stat. 632. 53 Stat. 1011. 50 U. S. C., app. 1§ 71. Advances. 56 Stat. 261 . D. C . Code, Supp. VII, §§ 8-201 to 8-219. Technicians.