"Jakob Dont (1815-1888) was an Austrian violinist, composer, and teacher. He was born and died in Vienna. Dont's compositions are mainly limited to innovative teaching material. His '24 Etudes and Caprices' Op. 35 and the '24 Exercises Preparatory to the Studies of R. Kreutzer and P. Rode' Op. 37 are considered some of the most important technical studies for the Violin. Among his students was Leopold Auer."

http://en.wikipedia.org/wiki/Jakob_Dont