Carl Friedrich Gaus, German mathematician, mid 19th century.
© Science Museum / Science & Society Picture Library
Photogravure after an earlier painting by Jensen. Carl Friedrich Gaus (1777-1855) together with Baron Augustin Louis Cauchy, founded the modern form of complex analysis, which was to have a profound effect on mathematics for the rest of the 19th century. He was also the inventor of the heliotrope, a surveying instrument. From a collection of portraits of scientists published by Photographische Gesellschaft, Berlin, 1910. Dimensions: 460mm x 340mm.