c. 1811—Bonn, Germany

Joseph Fröhlich writes his method, Vollständige theoretisch-pracktische Musikschule, which includes extensive pedagogical material for the trombone family. Fröhlich is somewhat contradictory. While he says, “In modern times, the three kinds of trombone are made similar in size in many places, and always similar in construction,” he later clearly states that the alto trombone is an instrument in E-flat: “Almost all of the foregoing  [about the tenor trombone] is also true of the alto trombone, except that it is a fourth higher, making the high notes even easier to get, and its fundamental is E-flat” (Guion, Trombone 112-113). Finally, in his trombone position charts that conclude the trombone portion of his method, he clearly shows a tenor trombone in B-flat and an alto trombone in E-flat (Guion 114-117, 300-309).*

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