The practice of scales is indispensable for obtaining technical ability; unfortunately it is too often neglected in default of a good system of fingering. To make scale-practice really profitable it is not enough for the student to play a scale from tonic to tonic; he must besides accustom himself to vary the rhythm and phrasing and he should begin successively on each degree of the diatonic scale. Such is the aim of the little work which we herewith offer to clarinettists.