1839
ID: 817
Louis Daguerre perfects photography using mathematical analysis of light and chemistry
ID: 817
1839
ID: 818
Charles Goodyear discovers vulcanization of rubber - first engineered polymer material
ID: 818
1839
ID: 4723
First Opium War begins - Britain forces China to accept opium trade
ID: 4723
1839
ID: 816
December 3, 1839
Pope Gregory XVI condemns slave trade in bull In Supremo Apostolatus
ID: 816