40 advanced studies by Russian trumpeter, author and St. Petersburg Conservatory Professor Wilhelm Wurm (1826-1906). Some etudes are based on a simple rhythm or sequence and focus upon harmonic changes and various technical challenges. Others are more melodic with more elaborate rhythms and ornamentation in less rigid context in terms of tempo. Typical technical challenges include: fingering dexterity, wide intervals (tongued and slurred), ornamentation (trills and gracenotes), complex rhythms such as 16th and 32nd note combinations, rapid tonguing, and more. Written in playable keys up to 3 sharps/flats. 37 pages. -pc