All investigators agree that tuberculosis is rare in infancy, when stated in proportion to the infantile population. This is true, notwithstanding the national statistics as to the number of deaths caused during infancy by tuberculous meningitis and tabes mesenterica. The number of deaths from tuberculosis rapidly became more numerous in the second year of life. According to Papassine, Rilliet, and Barthez, towards the age of five, half the deaths of children which occur are due to tuberculosis. Tatham has drawn attention to the fact that the age of maximum mortality from phthisis has been postponed in both sexes. The female death-rate from phthisis is seen to be higher in England and Wales as a whole during a large part of adult life than in Sheffield and Birmingham. The evil effects of urban conditions of life and work in increasing the male phthisis rate at the higher ages are well shown.