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Date |
Event(s) |
| 1 | 1845 | - 4 Mar 1845—3 Mar 1849: James Knox Polk, 11th President of the United States
 jJames K. Polk
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| 2 | 1846 | |
| 3 | 1847 | - 1847: US Mormons make Salt Lake City their centre
- Jan 1847: An anaesthetic used for the first time in England (James Simpson used ether to numb the pain of labour)
- 15 Apr 1847: North Australia
North Australia is reincorporated into New South Wales
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| 4 | 1848 | - 1848: First commercial production of chewing gum
- 24 Jan 1848: Gold found at Sutter's Mill, California
- 11 Jul 1848: Waterloo railway station in London opens
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| 5 | 1849 | - 1849: Florin (2 shilling coin) introduced as the first step to decimalisation
- 1849: Netherlands
King William II dies of a heart attack . On May 12 , King William III inaugurated
- 4 Mar 1849—9 Jul 1850: Zachary Taylor, 12th President of the United States
 Zachary Taylor
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| 6 | 1850 | - 9 Jul 1850—3 Mar 1853: Millard Fillmore, 13th President of the United States
 Millard Fillmore
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| 7 | 1851 | - 1851: Gold discovered in Australia
- 1851: Australia Gold Rush
Gold is discovered at Summerhill Creek and Ballarat
- 1 May 1851: Great exhibition of the works of industry of all nations ("Crystal Palace" exhibition) opened in Hyde Park
- 1 Jul 1851: Australia Victoria
Victoria colony is founded
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| 8 | 1852 | |
| 9 | 1853 | - 1853: Vaccination against smallpox made compulsory in Britain
- 4 Mar 1853—3 Mar 1857: Franklin Pierce, 14th President of the United States
 Franklin Pierce
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