Person: Gysel, Julius
Julius Gysel was a Swiss schoolteacher with an interest in geometry.
Mathematical Profile (Excerpt):
 Gysel grew up in his hometown with his four siblings and attended elementary school there.
 After being awarded his Matura in 1869, Gysel studied mathematics at the Polytechnic until 1872.
 Subsequently, Gysel attended mathematics lectures at the University of Bern for a year, notably those by Georg Sidler and Ludwig Schläfli.
 Whilst writing his thesis, Gysel worked as a supply teacher for mathematics at the Kantonsschule in Schaffhausen from 18721874.
 Gysel taught mathematics in the classical track until his retirement in 1926.
 Despite all the educational reforms since Gysel's death, his observation about the popularity of the school subject mathematics still holds true today  surely many of today's mathematics teachers would agree with him.
 Gysel greatly influenced the school not only as a teacher, but also in his capacity as headmaster in particular.
 Gysel's passion for physics experiments and technological progress (see paragraph below) is representative of his time.
 Gysel aka "Tschuli" was quite popular among his pupils, not only as a teacher, but also as headmaster.
 Throughout his life, Gysel educated himself further, both in his subjects and in educational matters.
 Gysel was also a keen member of the Naturforschende Gesellschaft Schaffhausen, his local Society for Natural Scientists, from 1876 onwards.
 Gysel became a member of the Deutsche MathematikerVereinigung in 1897.
 The list of his publications comprises only seven items: apart from his doctoral thesis, Gysel published three papers on problems in geometry as part of his school's Osterprogramme: Beiträge zur analytischen Geometrie der Kurven und Flächen 2.
 On top of his school duties, Gysel took on a number of positions in various committees, which again reflect his interest in education and in technological progress.
 One of their sons, also called Julius (18811972), graduated as a mechanical engineer from the ETH in 1906 and worked for an electric power company.
Born 11 August 1851, Wilchingen (Schaffhausen canton), Switzerland. Died 23 August 1935, Schaffhausen, Switzerland.
View full biography at MacTutor
Tags relevant for this person:
Astronomy, Origin Switzerland
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References
Adapted from other CC BYSA 4.0 Sources:
 O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive