1819 in science

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The year 1819 in science and technology involved some significant events, listed below.

Exploration

February 19 - Captain William Smith in British merchant brig Williams sights Williams Point, the northeast extremity of Livingston Island in the South Shetlands, the first land discovered south of latitude 60° S.
A British Arctic expedition under William Edward Parry comprising HMS Hecla and HMS Griper reaches longitude 112°51' W in the Northwest Passage, the furthest west which will be attained by any single-season voyage for 150 years.^[1]

August - René Laennec publishes De l’Auscultation Médiate ou Traité du Diagnostic des Maladies des Poumons et du Coeur in Paris, describing his invention of the stethoscope.
Second cholera pandemic originates in the Ganges Delta.

May 22 - SS Savannah leaves port at Savannah, Georgia on a voyage to become the first steamship to cross the Atlantic Ocean, although only a fraction of the trip is made under steam. The ship arrives at Liverpool, England, on June 20.
Invention of the M1819 breech-loading flintlock using interchangeable parts by Captain John H. Hall of Harpers Ferry Armory in the United States.