Crookshank well remarks that our present epidemiologic intelligence service is hardly superior to that of a Meteorologic Office which only gives warning of rain when unfurled umbrellas pass along the street. Influenza will surely return. There will be mild epidemics within the next few years. In time another pandemic will arrive, and after it will come pandemic after pandemic. In 1918 as in 1889 we were caught unprepared. Let us do our utmost to prevent the recurrence of this tragedy. To delay is to loose the valuable information gained during the last two years. The future is not without well grounded hope, but success will not be achieved until we have attained a much deeper understanding of the epidemiology of influenza. BIBLIOGRAPHY. ABBOTT, SAMUEL W. 1890. The influenza epidemic of 1889–90. 21st Annual Report of State Board of Health of Mass. Pub. Doc. No. 34, 307–384. 1892. Twenty-third Annual Report of the State Board of Health of Mass., 745. 1893. Twenty-fourth Annual Report of the State Board of Health of Mass., 33. 1894. Twenty-fifth Annual Report of the State Board of Health of Mass., 41. ABRAHAMS, HALLOWS, EYRE AND FRENCH. 1917. Purulent bronchitis; its influenzal and pneumococcal bacteriology. Lancet, II, 377. ABT, ISAAC, A. 1919. Influenza in a newly born infant. Jour. Am. Med. Ass., LXXII, 980. ACHARD, C., LEBLANC, A. AND LAVEDAN. 1919. Influenza in infants. Reviewed in Jour. Am. Med. Ass., LXXIII, 370. AMBERSON, J. B., JR. AND PETERS, A., JR. 1919. Epidemic influenza among tuberculous patients at the Loomis Sanatorium. Am. Rev. Tuberculosis, III, 359. 1920. Influenza and tuberculosis. Ibid., IV, 71. AMELUNG, W. 1919. Influenza in relation to pulmonary tuberculosis. Münch. Med. Woch., LXVI, 1321. AMERICAN PUBLIC HEALTH ASSOCIATION. 1919. Section on vital statistics; committee on statistical study of the influenza epidemic. Boston Med. and Surg. Jour., CLXXX, 22. ARMSTRONG, D. B. 1919. Influenza: Is it a hazard to be healthy? Certain tentative considerations. Ibid., 65. 1919. Influenza observations in Framingham, Mass. Am. Jour. Pub. Health, IX, 960. APERT AND FLIPO. 1920. Influence du sex aux différents ages sur la gravité de la grippe. Bull. et Mém. Soc. Méd. des Hôp. de Paris, 321. ATILES, F. DEL VALLE. 1919. Influenza in Porto Rico. Abstr. in Jour. Am. Med. Ass., LXXII, 688. BARTHÉLEMY. 1920. La pandemie grippale de 1918–1919 à Bizerte. Rev. d’Hygiène et de Police Sanit., XLII, 41. BENJAFIELD, J. D. 1919. Notes on the influenza epidemic in the Egyptian Expeditionary Force. Brit. Med. Jour., II, 167. BERGHOFF, R. S.