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20

Centuries: 1st century BC - 1st century - 2nd century

Decades: 20s BC 10s BC 0s BC 0s 10s - 20s - 30s 40s 50s 60s 70s

Years: 15 16 17 18 19 - 20 - 21 22 23 24 25


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Timeline of medicine and medical technology

... properties of nitrous oxide 1816 - Rene Laennec[?] invents the stethoscope 1842 - Crawford Long[?] performs the first surgical operation using anasthesia 1847 - ...