Billings, J. S. “The Mortality Rates of Baltimore; Life Table for Baltimore; Mortality in Different Wards; Causes of Disease,” _Baltimore Med. Jour._, X (1883–84), 487–89. (V, 1.) “Biological Influences of City Life,” _Literary Digest_, LII (February, 1916), 371–72. “Birth- and Death-Rates in American Cities,” _Amer. City_, XVI (1917), 195–99. Bleicher, H. “Über die Eigentümlichkeiten der städtischen Natalitäts- und Mortalitätsverhältnisse,” _Intern. Kongr._ für Hygiene und Demographie (Budapest, 1894). (VIII, 3.) The peculiarities of urban birth and death rates. Dublin, Louis I. “The Significance of the Declining Birth-Rate,” _Science_, (new series), XLVII, 201–10. Fehlinger, Hans. “De l’influence biologique de la civilization urbaine,” _Scientia_, X (1911), 421–34. (VIII, 3.) Guilfoy, W. H. _The Influence of Nationality upon the Mortality of a Community, with Special Reference to the City of New York_, “Department of Health of New York City Monograph Series 18,” 1919. (V, 1, 2, 3.) ——. _An Analysis of the Mortality Returns of the Sanitary Areas of the Borough of Manhattan for the Year 1915_, “Department of Health of New York City Monograph Series 15,” 1916. Hammond, L. J., and Gray, C. H. “The Relation of the Foreign Population to the Mortality and Morbidity Rate of Philadelphia,” _Bull. Amer. Acad. of Med._, XIV (1913), 113–29. (V, 1.) Harmon, G. E. “A Comparison of the Relative Healthfulness of Certain Cities in the United States, Based upon the Study of Their Vital Statistics,” _Publ. Amer. Statist. Assoc._, XV (Boston, 1916), 157–74. Holmes, Samuel J. _A Bibliography of Eugenics_, “University of California Publications in Zoölogy,” Vol. XXV, Berkeley, California, 1924. Contains a chapter on “Urban Selection and the Influence of Industrial Development on Racial Heredity.” Has served as a source of many references listed in this bibliography. (VIII.) Love, A. G., and Davenport, C. B. “Immunity of City-Bred Recruits,” _Arch. Med. Intern._, XXIV (1919), 129–53. Macpherson, J. “Urban Selection and Mental Health,” _Rev. of Neurol. and Psychiatry_, I (1903), 65–73. (VII, 2, 5; IX, 2, 3, 4; X, 3.) Meinshausen: “Die Zunahme der Körpergrösse des deutschen Volkes vor dem Kriege; ihre Ursachen und Bedeutung für die Wiederherstellung der deutschen Volkskraft,” _Archiv für Hygiene und Demographie_, XIV (1921), 28–72. Points out degeneration of urban youth. (VII, 3; X, 3.) Pieper, E. “Über die Verbreitung der Geschlechtskrankheiten nach Stadt und Land mit besonderer Berücksichtigung der Verhältnisse der Stadt Rostock und des Staates Mecklenburg,” _Arch. für Soz. Hygiene und Demographie_, XIV (1923), 148–87. (X, 2.)