RT Journal A1 MARCUS L T1 OPen air classes JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1919 FD October 4 VO 73 IS 14 SP 1057 OP 1059 DO 10.1001/jama.1919.02610400035013 UL http://dx.doi.org/10.1001/jama.1919.02610400035013 AB The Bureau of Child Hygiene of the department of health of New York City conducts only activities of preventive medicine. These activities cover a period of the child's life from the prenatal state until the completion of the elementary school. The activities are controlled by definite divisions of the bureau to cover various periods of life, as well as special activities. The division of baby welfare supervises the prenatal work and care of the infant from birth until the second year is reached. The division of midwives and foundlings issues permits to midwives and supervises their methods in carrying on their practice. It also issues permits for the privilege of keeping foundlings, and supervises the care they receive. The division of school medical inspection conducts a progressive campaign of preventive medicine throughout the year, both in the schools and in the homes of the pupils. The division of employment certificates