List of Famous people who died in 1925

Richard Cassirer was a German neurologist born into a Jewish family in Breslau.

Arthur Carl Wilhelm Heffter was a German pharmacologist and chemist. He was the first chairman of the German Society of Pharmacologists, and was largely responsible for the first Handbook of Experimental Pharmacology. He isolated mescaline from the peyote cactus in 1897, the first such isolation of a naturally occurring psychedelic substance in pure form. In addition, he conducted experiments on its effects by comparing the effects of peyote and mescaline on himself.

Carl Gottfried Neumann was a German mathematician.

Rudolf Joseph Lorenz Steiner was an Austrian philosopher, social reformer, architect, esotericist, and claimed clairvoyant. Steiner gained initial recognition at the end of the nineteenth century as a literary critic and published philosophical works including The Philosophy of Freedom. At the beginning of the twentieth century he founded an esoteric spiritual movement, anthroposophy, with roots in German idealist philosophy and theosophy; other influences include Goethean science and Rosicrucianism.

August Paul von Wassermann was a German bacteriologist and hygienist.

Martin Emil Ferdinand Haller (1835–1925) was a German architect, who designed the Hamburg Rathaus and the building of the Consulate General of the United States in Hamburg, and a member of the Hamburg Parliament.

Carl Oswald Victor Engler was a German chemist, academic and politician. He wrote a Handbook of Industrial Chemistry in 1872. He is remembered for his early work in indigo.

Hermann Paasche was a German statistician and economist. He is known for his Paasche Index, which provides a calculation of the Price Index. Paasche studied economics, agriculture, statistics and philosophy at University of Halle. In 1879, he became a professor of political science at Aachen University of Technology. Paasche died in 1925 in Detroit, Michigan, United States.

Thomas Drinkwater Chataway was an English-born Australian politician. Born in Wartling, Sussex, he was educated at Charterhouse School before migrating to Australia in 1881, where he became a grazier and mill-owner in New South Wales and then Queensland. He was a leader among Queensland cane growers, sitting on Mackay Council and serving as mayor in 1904. In 1906 he was elected to the Australian Senate as an Anti-Socialist Senator for Queensland. He joined the Commonwealth Liberal Party when it formed in 1909. Chataway was defeated in 1913, after which he became a journalist in Melbourne. He died in 1925 at his home in Toorak, Victoria.

Gerhard Hessenberg was a German mathematician. He received his Ph.D. from the University of Berlin in 1899 under the guidance of Hermann Schwarz and Lazarus Fuchs. His name is usually associated with projective geometry, where he is known for proving that Desargues' theorem is a consequence of Pappus's hexagon theorem, and differential geometry where he is known for introducing the concept of a connection. He was also a set theorist: the Hessenberg sum and product of ordinals are named after him. However, Hessenberg matrices are named for Karl Hessenberg, a near relative.