Joseph Sellner (1787-1843) was a famous oboe player of his time. In 1825, Sellner published an oboe tutor in three volumes entitled Theoretisch-Praktische Oboen-Schule. Despite the fact that the instrument has undergone considerable changes and improvements since his time, the majority of Sellner's work has still retained its usefulness to this day. His studies provide valuable help for achieving smooth technique and tone-colour, especially at the beginner level. The obsolete two-part exercises and interval studies written for the instrument of his time have been omitted in this volume. The studies have been arranged here, as opposed to the original sequence, according to the order of key signatures.