skill. Though he had performed well for the Royal Cause in the War with the Roundheads, he made his living as a Graunt is spoken of several times in Pepy’s Diary. Graunt was the first person to analyze the bills of mortality, which recorded the weekly counts of christenings and deaths in London. There are few references to Graunt in the Journal and we are pleased to publish this article by Dr Glass.- Eds. available to Graunt were defective but he handled his limited material with considerable skill. There are few references to Graunt in the Journal and we are pleased to publish this article by Dr Glass.—Eds. John Graunt, an English tradesman, statistician, and epidemiologist, was born Apr. Graunt’s genius was to recognise, as none of his contemporaries had done, the immense importance of what we would now call a ‘data-base’ which had existed in London for about 60 years. To call Graunt a statistician and an epidemiologist, while true, is misleading, because neither discipline existed until Graunt published his milestone book, Natural and Political Observations Made Upon the Bills of Mortality, in 1662. The names of Girolamo Fracastoro, John Graunt, Dr. John Snow, P. A. Schleisner and Ignaz Semmelweis are just few of the many physicians who pioneered in the field of epidemiology. J.I.A. Graunt seems to have been the first to arrive at an infant mortality rate (IMR), but this has been little explored. John Graunt’s Life Table —Thompson 4 the Royal Society of London. Until this time, epidemiology is one type of study that is considered to be most useful in research, especially in the field of health related issues. John Graunt's pioneering study, Natural and Political Observations Made upon on the Bills of Mortality (1662) has been overlooked as a source for ideas about the importance of child mortality in an urban environment. It is natural, in view of the importance of John Graunt in the history of J.I.A. Another significant contribution to the foundation of epidemiology was made in the 17th century, with the work of English statistician John Graunt. 37 Lessons from John Graunt Kenneth J Rothman Department of Epidemiology, Boston University School of Public Health, and Department of Preventive Medicine, Boston University School of Medicine, Boston, MA, USA (K J Rothman DrPH) Correspondence to: Dr K J Rothman, Epidemiology, 1 Newton Executive Park, Newton Lower Falls, MA 02161, USA John Graunt, 17th century citizen of London, thought of 24, 1620. When the King became ill and was not looking to business very closely, Graunt was dropped from the member-ship of the RSL. It is natural, in view of the importance of John Graunt in the history of demography, that considerable attention should have been paid to Graunt's life table. John Graunt, an English statistician and founder of science of demography, is born John Graunt , Demography , Year 1620 , April 24 , 1620s , Births , Kingdom of England , 17th Century , Science , History of United Kingdom , Science and Technologies , Modern History , Europe , Earth , Solar System , Milky Way