1805 In Science

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The year 1805 in Science and Technology included many events, some of which are listed here.

EXPLORATION

April 7 - The Lewis And Clark Expedition leaves Fort Mandan, bound for the Pacific Ocean

August 9 - Zebulon Pike leaves St. Louis to explore the headwaters of the Mississippi River

November 16 - The Lewis and Clark expedition reaches the Pacific Ocean at the mouth of the Columbia River

AWARDS

BIRTHS

February 13 - Peter Gustav Lejeune Dirichlet , mathematician (died 1859 )

May 12 - William Rowan Hamilton , mathematician, physicist, and astronomer (died 1865 )

December 16 - Isidore Geoffroy Saint-Hilaire , zoologist (died 1861 )

December 20 - Thomas Graham , chemist (died 1869 )

DEATHS

January 23 - Claude Chappe , inventor of the Semaphore system (born 1763 )

December 23 - Pehr Osbeck , Swedish botanist and explorer, pupil of Linnaeus (born 1723 )