The Earliest Spot Map of All Dr. John Snow did not draw a map until December, 1854; the first spot map was produced in September of that year by Edmund Cooper, an engineer for the Metropolitan Commission of Sewers (see map below). Cooper’s investigation resulted from public complaints linking the sewers to the cholera outbreak. Rumors […]

Dr. John Snow is credited with taking bold action when he sensed that contaminated water from the public pump on Broad Street was the cause of deadly cholera during the 1854 outbreak in London. Here is what he wrote of his legendary action on September 7, 1854. [SOURCE] HANDLE OF THE BROAD STREET PUMP “I […]

Personal Note: As many of you know, I was a History major as an undergraduate in college. I started in Computer Science (thus the minor degree), but began to love history because of the influence of my Freshman History Survey course and its amazing teacher, Dr. Bruce E. Seely. His focus was history of technology. […]