1823 in science

The year 1823 in science and technology involved some significant events, listed below.

Astronomy

June 17 – Charles Macintosh patents a method of rubberizing fabric to waterproof it.

February 20 – James Weddell's expedition to Antarctica reaches latitude 74°15' S and longitude 34°16'45" W, the most southerly position that will be attained for more than 80 years.

János Bolyai completes a treatise on parallel lines that he calls absolute geometry, although it will not be published until 1832.

After August – Philipp Franz von Siebold begins to introduce Western medicine to Japan.
October 5 – The Lancet founded by Thomas Wakley.
Theodric Romeyn Beck publishes the first significant American book on forensic medicine, Elements of Medical Jurisprudence in Albany, New York.

January 23 – In a cave on the Gower Peninsula of Wales, William Buckland inspects the "Red Lady of Paviland", the first identification of a prehistoric human burial. The bones, discovered on December 21 last, are with those of the woolly mammoth, proving that the two had coexisted, although Buckland dates th human remains as Roman.
December 10 – On the Jurassic Coast of southern England, Mary Anning finds the first complete Plesiosaurus skeleton.

December 6 – English inventor Samuel Brown obtains his first patent for a hydrogen fuelled compressionless atmospheric gas vacuum engine, the first History of the [internal combustion engine|internal combustion engine] to be applied industrially.
First use of a Fresnel lens in a lighthouse optic, at the Cordouan lighthouse on the Gironde estuary.
First permanent wire cable suspension bridge, Pont Saint Antoine in Geneva, by Guillaume Henri Dufour, of two 40 m spans.
First cast iron framed greenhouse erected at Wollaton Park in England as a Camellia house.
French officer Henri-Joseph Paixhans develops the Paixhans gun, the first naval artillery to fire explosive shells.

Annals of the [New York Academy of Sciences] first published.