Karl Gustav Reuschle
Karl Gustav Reuschle (26 Dezember 1812 – 22 May 1875) was a German mathematician, geographer and educator.
Reuschle was born in Mehrstetten in Baden-Württemberg and studied math and theology at the University of Tübingen. After his graduation he continued his studies in mathematics for a year in Paris and for a year in Berlin. From 1837 onwards Reuschle worked as a teacher, first in Schöntal then in Tübingen (1938) and finally since 1840 at a gymnasium in Stuttgart, where he taught as professor for mathematics and geography.[1]
Reuschle authored a number of science books, mostly on geography and mathematics. Particularly well received at the time was his biography of Johannes Kepler (1871).[1] His son Karl Reuschle (1847–1909) was a mathematician as well, he became the cofounder of the mathematical seminar at the University of Stuttgart.[2][3] Reuschle died on 22 May 1875 in Stuttgart.[1]
In elementary geometry Reuschle's theorem is named after him.
Works
    
- Analytische Theorie der Bewegung des sphaerischen Pendels. Stuttgart 1840
 - Vollständiges Lehrbuch der Geographie; mit Einschluß der Hilfkenntnisse nach neuem Plan in zwei selbständigen Theilen. Stuttgart, Schweizerbart, 1852 (2 volumes)
 - Illustrierte Geographie für Schule und Haus. Stuttgart 1856
 - Handbuch der Geographie. Stuttgart 1859
 - Philosophie und Naturwissenschaft. Bonn 1874
 - Mathematische Abhandlungen. Stuttgart 1850, 1853
 - Die Arithmetik in der Hand des Schülers. Stuttgart 1850
 - Kepler und die Astronomie. Frankfurt 1871
 - Elemente der Trigonometrie. Stuttgart 1873
 - Kosmos für Schule und Laien. Stuttgart 1848 (2 volumes)
 - Einführung in die Determinatentheorie: Stuttgart 1884
 - Praxis der Kurvendiskussion. Stuttgart 1886
 - Tafeln komplexer Primzahlen aus Wurzeln der Einheit gebildet. Berliner Akademie der Wissenschaften 1875
 
References
    
- Moritz Cantor (1889), "Reuschle, Karl Gustav", Allgemeine Deutsche Biographie (ADB) (in German), vol. 28, Leipzig: Duncker & Humblot, p. 298
 - Karin Reich: Der Mathematiker Rudolf Mehmke: Bausteine zu Leben und Werk at www.kk.s.bw.schule.de (German, retrieved 2019-05-12)
 - Carl Reuschle (1847 - 1909) at www.kk.s.bw.schule.de (German, retrieved 2019-05-12)