John Snow's Ghost Map

A Court for King Cholera, 1852. A scene typical of the crowded, unsanitary conditions in London slums. Cholera first appeared in Britain in 1831, and outbreaks occurred regularly in London in the mid 19th century. Its relationship with contaminated water was not understood until established by John Snow. Ann Ronan Pictures/Print Collector / Print Collector/Getty Images

In this episode of Stuff You Missed in History Class, Katie and Sarah discuss Dr. John Snow's famous "ghost map" and work tracing a cholera outbreak in Victorian London.

View Transcript here.