Special References: L. Cuénot, “ L Térédité chez les Souris,” Arch. coal. exp. et gen. (1905); H. Nilsson - -Ehle, “ Kreuzungsunters. an Hafer u. Weizen,” Lunds Universitets Ars- skrifi (1909 and 1911); E. M. Maitland, Tke Log of H. M. Harwood, produced at the same time and un- certainties of our growing cities call for mail steamers. Public Iealth.—The birth-rate in 1923 counted