1848—Paris, France

Jean Georges Kastner’s treatise on military music, Manuel Général de Musique Militaire, includes prints of a number of different types of trombones used in military music, including rear-facing trombone, double-slide trombone, and several types of valve trombones (see below image; public domain). The note on the bottom of the page reads, “There are, as we know, three types of trombone, alto, tenor, and bass; but it is simply a difference in size and not in the shape of the instrument (Kastner, Militaire Pl. XVII).*