### Biography of Eduard Selling

Eduard Selling was born on 5 November, 1834, in Ansbach, Bavaria, Germany (the same town, where some time ago lived Johann Christoph Schuster, a brother-in-law of Hahn, and Johann Paul Bischoff), in a family of a professor.

Selling studied mathematics at Georg-August-Universität in Göttingen and Ludwig-Maximilians-Universität in München, where he was a student of the famous German mathematician and astronomer Philipp Ludwig Ritter von Seidel.

In 1859 Selling obtained a Ph.D. degree at Universität München, and in 1860 he was appointed as an associate professor of mathematics at the Bayerische Julius-Maximilians-Universität in Würzburg, recommended by the famous mathematician Leopold Kronecker. Selling hold this position and taught mathematics and astronomy until his retirement in 1906.

Julius-Maximilians-Universität Würzburg

In 1879 Selling was appointed as a curator of the Astronomical Institute. He proved himself as a very good mathematician and published a series of works on number theory and then on insurance mathematics. On behalf of various ministries, he developed models, with which the pension system in Bavaria could be rearranged.

Selling is a constructor of several calculating machines (see calculating machines of Selling). His machines demonstrated exceptional ideas and ingenuity, but were complex and difficult for manufacturing and work, that's why they didn't achieve any market success.

Eduard Selling died on 31 January, 1920, in München.