Just wondering what tuba this is. It doesn't look like anything I thought Bill Bell played. Under this photo in the book is:
Position for Holding the Upright Model Tuba
Sit as straight as possible, with feet placed firmly upon the
floor. Right hand should rest lightly on valves with the fingers
straight. Left hand should be as inconspicuous as possible.
(Note position of mouthpiece on the lips)
Wasn't Bill Bell a stickler about having your fingers bent, not straight?
The contents also provides a partial answer to the question about band excerpts: