Template:POTD/2023-03-21

Picture of the day

Joseph Fourier (21 March 1768 – 16 May 1830) was a French mathematician and physicist born in Auxerre and best known for initiating the investigation of Fourier series, which eventually developed into Fourier analysis and harmonic analysis, and their applications to problems of heat transfer and vibration. The Fourier transform and Fourier's law of conduction are also named after him. He is also generally credited with the discovery of the greenhouse effect. This engraving of Fourier was drawn by Julien-Léopold Boilly, a French artist noted for his album of lithographs titled Iconographie de l'Institut Royal de France (1820–1821) and his booklet Album de 73 portraits-charge aquarellés des membres de l'Institut (1820), containing watercolor caricatures of seventy-three members of the Institut de France.Engraving credit: Amédée Felix Barthélémy Geille, after Julien-Léopold Boilly; restored by Bammesk