Pettenkofer, Max von
Max von Pettenkofer (mäks fən pĕt´ənkō´fər), 1818–1901, German chemist and hygienist. He studied medicine at Munich. Pettenkofer is considered a founder of epidemiology and is known for his researches in the ventilation of dwellings, sewage disposal, and the spread of cholera. He developed a reaction for the detection of bile acids and a method for the quantitative determination of carbon dioxide.