John Snow, Asiatic Cholera and the inductive-deductive method

Lecture 13: Farr’s Law of epidemics

We have seen the spatial distribution of deaths in the area of the Broad Street pump. Snow adds to this with a time distribution showing that the peak of the outbreak occurred in the first two days of September 1854. There had been sporadic cases up to then, but all of a sudden, 143 new cases arose on 1 September, followed almost immediately by a peak i…