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1805 in science
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==Births== * February 13 – [[Peter Gustav Lejeune Dirichlet]], [[mathematician]] (died [[1859 in science|1859]]) * May 12 – [[William Rowan Hamilton]], mathematician, [[physicist]] and [[astronomer]] (died [[1865 in science|1865]]) * July 5 – [[Robert FitzRoy]], admiral and [[meteorologist]] (suicide [[1865 in science|1865]]) * August 13 - [[Antoine Constant Saucerotte]], [[French people|French]] [[physician]] (died [[1884 in science|1884]])<ref name="Léonore">{{Base Léonore|LH/2463/9}}</ref> * December 16 – [[Isidore Geoffroy Saint-Hilaire]], [[zoologist]] (died [[1861 in science|1861]]) * December 20 – [[Thomas Graham (chemist)|Thomas Graham]], [[chemist]] (died [[1869 in science|1869]]) * December 22 – [[John Obadiah Westwood]], [[entomologist]] (died [[1893 in science|1893]]) * [[Mary Seacole|Mary Seacole (née Grant)]], [[nurse]] (died [[1881 in science|1881]])
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