Designed to develop breath control, lip flexibility and a muscular embouchure. Each group is essentially the same exercise transposed into a number of appropriate keys. The author inserts useful commentary throughout the book so that the player does nothave to play "blind" as to his intentions. Following the 27th group is a bonus section of 46 short to medium length exercises dealing with the development of double and triple tonguing skills. 32 pages. -cdp