Arthur Geissler concluded from a study of about 26,000 births of unselected marriages among miners that the mortality of children was least in the four first-born, and then increased to a very high rate. Following are Geissler’s figures, (marriages with only one or two children are omitted). Deaths during first year 1st born children 23% 2nd born children 20% 3rd born children 21% 4th born children 23% 5th born children 26% 6th born children 29% 7th born children 31% 8th born children 33% 9th born children 36% 10th born children 41% 11th born children 51% 12th born children 60% _INFANT MORTALITY. Results of a Field Study in Johnstown, Pa., based on Births in one calendar year. By Emma Duke, Infant Mortality Series, No. 3. Bureau Publication No. 9. U. S. Department of Labor, Children’s Bureau._ The pamphlet embodies the result of a field study in Johnstown, Pa., based on one calendar year. The inspection was made in 1913, of the 1911 babies, so that even the last born baby included had reached its first birthday—or rather had had a chance to reach its first birthday; many of them were dead long before that day. Every mother of a 1911 baby was visited. She was questioned about the health of that child and all her other children. The report takes up the familiar factors—neighborhood environment, sanitary conditions, sewage, housing, nativity, attendance at birth, feeding, age of mother, and like matters. Full information is given on these points. Then the report considers infant mortality from a novel viewpoint—the relation of the death rate to the size of the family. The Johnstown statistics include families varying in number from one child to ten and over, and varying in health from none living to all living. The result of the study of infant mortality in relation to the size of the family is thus stated: “The statistics, based on the results of all her reportable pregnancies, show a generally higher infant mortality rate where the mother has had many pregnancies, but there is not always an increase from one pregnancy to the next.” The following table shows this tendency. It is based on the reproductive histories of 1,491 married mothers who had 5,617 births. Miscarriages are not included. Infant Mortality Rate for all Children borne by Married Mothers: Table 36