abstract: Nikolay Andreyevich Rimsky-Korsakov’s Concerto for Trombone and Military Band and Georg Philipp Telemann’s Sonata in F minor TWV 41:f1 are two works from contrasting periods written by well-known composers. International Music Company first published the Sonata in 1968 for trombone, edited by Allen Ostrander. Rimsky-Korsakov’s Concerto for Trombone was first published in the United States by Leeds Music Corporation in 1952, edited by Davis Shuman. Both of these compositions contain editorial concerns that detract from each composer’s original music. In most modern editions, Rimsky-Korsakov’s Concerto is accompanied by a piano reduction made by Nikolay Sergeyevich Fedoseyev. Although this reduction is the most commonly used accompaniment today, it is overly difficult for the pianist. The reduction also alters musical gestures within the accompaniment written by Rimsky-Korsakov. This project contrasts modern editions of each composition with their oldest known manuscript. For Telemann’s Sonata, this is the first publication in Der Getreue Music-Meister, published by the composer in 1728-29. For Rimsky-Korsakov’s Concerto, this is a copyist’s manuscript that is currently housed at the library of the Moscow State Academic Philharmonic. The centerpiece of this project is the preparation of new solo parts for each work and a new piano reduction for Rimsky-Korsakov’s Concerto that restores the composer’s original intentions and makes clear editorial changes and suggestions. / Dissertation/Thesis / Doctoral Dissertation Music 2016