53 STAT.] 76TH CONG. , IST SESS.-CH. 281 -JULY 15, 1939 including their use in indigent cases, and for the prevention of infantile paralysis and other communicable diseases, and of an Act for the prevention of venereal diseases in the District of Columbia, and for other purposes, approved February 26, 1925 (43 Stat. 1001-1003), and for maintenance of disinfecting service, including salaries or compensation for personal services, when ordered in writ- ing by the Commissioners and necessary for the enforcement and execution of said Acts, and for the prevention of such other commu- nicable diseases as hereinbefore provided, and purchase of reference books and medical journals, $47,230: Provided, That any bacteriolo- gist employed under this appropriation may be assigned by the health officer to the bacteriological examination of milk and other dairy products and of the water supplies of dairy farms, and to such other sanitary works as in the judgment of the health officer will promote the public health, whether such examinations be or be not directly related to contagious diseases. Maintenance of dispensaries: For the maintenance of a dispensary or dispensaries for the treatment of indigent persons suffering from tuberculosis and of indigent persons suffering from venereal diseases, including payment for personal services, rent, supplies, and con- tingent expenses, $53,340: Provided, That the Commissioners may accept such volunteer services as they deem expedient in connection with the establishment and maintenance of the dispensaries herein authorized: Provided further, That this shall not be construed to authorize the expenditure or the payment of any money on account of any such volunteer service. Nursing service: For maintaining a nursing service, including per- sonal services, uniforms, supplies, and contingent expenses, $154,340: Provided, That the Commissioners may accept such volunteer services as they deem expedient in connection with the maintenance of the nursing service herein authorized: Provided further, That this shall not be construed to authorize the expenditure or payment of any money on account of any such volunteer service. Abatement of nuisances: For enforcement of the provisions of an Act to provide for the drainage of lots in the District of Columbia, approved May 19, 1896 (29 Stat. 125-126), and an Act to provide for the abatement of nuisances in the District of Columbia by the Commissioners, and for other purposes, approved April 14, 1906, $1,000. School hygiene and sanitation, salaries: For personal services in the conduct of hygiene and sanitation work in schools in the District of Columbia, including the necessary expenses of maintaining free dental clinics, $114,700. For maintenance of laboratories, including reference books and periodicals, apparatus, equipment, and necessary contingent and miscellaneous expenses, $6,000. Contingent expenses, foods and drugs: For contingent expenses incident to the enforcement of an Act relating to the adulteration of foods and drugs in the District of Columbia approved February 17, 1898 (30 Stat. 246-248), an Act to prevent the adulteration of candy in the District of Columbia, approved May 5, 1898 (30 Stat. 398), an Act for preventing the manufacture, sale, or transportation of adulterated or misbranded or poisonous or deleterious foods, drugs, medicines, and liquors, and for regulating traffic therein, and for other purposes, approved June 30, 1906 (34 Stat. 768-772), and an Act to regulate, within the District of Columbia, the sale of milk, cream, and ice cream, and for other purposes, approved February 27, 1925 (43 Stat. 1004-1008), including traveling and other neces- sary expenses of dairy farm inspectors, and car tokens and passes for 1021 Infantile paralysis, etc. Venereal diseases. 43 Stat. 1001. Disinfecting service. Proviso. Bacteriological ex- amination of milk, etc. Maintenance of dis- pensaries. Provisos. Volunteer services. Compensation re- striction. Nursing service. Provisos. Volunteer services. Compensation re- striction. Abatement of nul- sances. Drainage oflots. 29 Stat. 125. 3t1 tat. 114. School hygiene and sanitation, salaries. Free dental clinics. Laboratories, main- tenance. Contingent ex- penses, foods and drugs. 30 Stat. 246 , 398. 34 Stat. 768. 21U.S.C. 1-5; 7-15 . Milkregulation. 43 Stat. 1004.