| 1 | 1851 | - 1851: UK - The Great Exhibition is staged in Hyde Park. Thanks to Prince Albert, it is a great success
- 1851: UK - Window tax abolished
- 1851: USA - Patent for sewing machine issued to Isaac Singer
- 1851: UK - British Census shows 10,736,000 females, 8,155,000 of whom were aged 10 and older, largest occupational group domestic service workers, 905,000, 145,000 washerwomen, 55,000 charwomen (cleaners), 272,000 in cotton industry, 113,000 in woolen industry, 140,000 in lace, hosiery and linen
- 1851: Europe - First submarine cable, Dover to Calais
- 1851: London, UK - Reuters opens news agency
- 1851: Africa - Livingstone's explorations begin
- 1851: Australia - Population of Australia rises from 405,000 in 1851 to 1,168,000 in 1861
- Sep 1851: Melbourne, Australia - Gold fever - 19,000 immigrants land in one month, for the whole year 94,664, seven times as many as 1851
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1851 - 1851 (0 years)