In the small world of clarinet, the "32 Studies" by Rose is unquestionably one of the most famous and most used book. Based on the "48 Studies op. 31" for Oboe by Ferling, Rose freely changed the structure, scope, tone of the original studies to adapt to the note range and to the specificities of the clarinet. These studies are, therefore, true re-creations that Rose proposes to clarinet students. Encompassing a wide variety of musical and technical challenges, they are a perfect preparation for the repertoire of the 19th century and, as such, have never been replaced. Through many republications, these studies were themselves revised and supplemented with expressive indications, dynamics, articulations, phrasings and tempi sometimes overloading the original text. The interest of this new publication is double: first it provides the original studies by Rose (1893), then it shows aside the study for oboe by Ferling that Rose used as a reference (published by Bachmann in 1840), transposed by us in key chosen by Rose for clarinet. The student can thus easily compare the two versions, understand the changes, additions and transformations done by Rose, and enrich his/her approach of the style and phrasing of each study. To complete this analysis, indications of ways of working are given (in French) throughout the book.