Emile Joseph Trognee's career took place not only during a time unsurpassed with regards to the musical and constructional developments of the trumpet, but also in the highly important and evolving musical environment of Imperial and Soviet Russia. As a result of an investigation of their inherent musical qualities, this document will establish how Emile Trognee's works are representative of European trumpet and cornet pedagogical and musical trends of the early 20th century. Through formal, thematic and harmonic analysis of these works, the key pedagogical and stylistic features are identified and discussed as consistent or unique to those of the period. Preceding that analysis and critical to an understanding of the contextual relevance of this material is a summation of the important 19th and early 20th century musical developments that influenced the instruction and use of the trumpet and cornet in Russia and Europe. It is hoped that modern study of the challenging works of that period will benefit from a better understanding of the performance and educational practices of those who were present at their inception or particularly adept in their performance.