Contents of volume one: Preliminary notion on sound-emitting; Exercises on the seven positions. General tablature of the tenor trombone; exercises on sound adjustment; nimble and clean tonguing: two recapitulatory studies for two trombones. The various emissions: Two short recapitulatory pieces for two trombones. Legato: A short melodious piece for two trombones; Studies of articulations in various tonalities: C major and A minor; G major and E minor; Short melodious piece for two trombones. D Major and B minor; F major and D minor; Three short melodious pieces for two trombones (after Haydn). 67 pages (numbered 1-67).