1829 in science

The year 1829 in science and technology involved some significant events, listed below.

Chemistry

Peter Gustav Lejeune Dirichlet publishes a memoir giving the Dirichlet conditions, showing for which functions the convergence of the Fourier series holds; introducing Dirichlet's test for the convergence of series; the Dirichlet function as an example that not any function is integrable; and, in the proof of the theorem for the Fourier series, the Dirichlet kernel and Dirichlet integral. He also introduces a general modern concept for a function.
Nikolai Ivanovich Lobachevsky publishes his work on hyperbolic non-Euclidean geometry.
S. D. Poisson publishes Sur l'attraction des sphéroides.

Jules Desnoyers names the Quaternary period.
Engis 2, part of the skull of a young child and other bones, recognised in 1936 as the first known Neanderthal fossil, is found in the Awirs cave near Engis in the United Kingdom of the Netherlands by Philippe-Charles Schmerling.

May – Cyrill Demian patents a version of the accordion in Vienna.
June 30 – Henry Robinson Palmer files a British patent application for corrugated iron for use in buildings.
July 23 – In the United States, William Burt obtains the first patent for a form of typewriter, the typographer.
October 6–14 – The Rainhill Trials, a steam locomotive competition, are run in England and won by Stephenson's Rocket.
December 19 – Charles Wheatstone patents the concertina in Britain.
William Mann invents the compound air compressor.
Louis Braille publishes the first description of his method of embossed printing that allows the visually impaired to read.