Herbert Clarke Technical Studies

This prepatory exercise is from a series of articles published in "Brass Bulletin" (1980), by James Stamp, called Practical Hints. Here, Stamp show how to practice the "Technical Studies" by Herbert L. Clarke.
Third Study
For example (exercise 57)

Play legato

Repeat the last part 10 times.

By practising like this you will learn to "place" and "centre" your notes correctly, and to improve the fluency, flexibility and intonation of your playing.

O.J. 1996