I have a "comment copy" of my lip slur book. Whenever I find something that is a mistake, I scribble the page number on the front cover.
It occurred to me that, if I lose that book, I'll lose all those notes.
Here are mistakes/corrections in the book as I've noticed them thus far:
p.18 #26, the 7th position mark should be placed at the beginning of the bar and, one line 2 the sharp 5th valve indication should be over the A, not the D
p.58 #38b. the 3/2 measures...not sure what I was thinking here. Best to leave them out, they don't serve a purpose, really
p.60 #39 a. 4th line. 6th position is a better choice than 4th for the last rip to a high F
p.65 #2a. 2nd line should be mezzo forte
p.76 #12 5th line should have a decrescendo following the forte, not a crescendo