From the introduction:

“The tremendous success of these concentrated studies depends entirely upon the fact that the exercises, which are progressively arranged, assist the instrumentalist to surmount those technical difficulties which are encountered in modern music.

Arrangers and composers are writing passages for the tuba and trombone which, not many years ago, would have been considered impossible. The books in this series were written by the finest men available and were edited on the basis of the most modern teaching methods.”

Take a look at the sample pages, including the introduction, and then click above for an immediate PDF download.