Researched
Chlorinated drinking water
Jersey City began chlorinating its reservoir water in 1908; killing germs with chlorine cut typhoid and cholera in cities within a few decades.
Open in the interactive tree →Engineer John Leal dosed the supply with chloride of lime, and a 1910 court ruling upheld the practice. Filtration plus chlorination became standard in industrial cities, and typhoid deaths fell steeply.
Prerequisites
Sources
More in Medicine · Machine Age
- Vitamins and deficiency diseases1747-1912
- Blood groups and transfusion1901
- Electrocardiogram1903
- Salvarsan: the magic bullet1909
- Insulin1921
- Antibiotics1928
- Sulfa drugs1935
- Chemotherapy1942