[Trombone-l] Positions

[Randy Fendrick]

I came across an etude book 66 Etudes by Anton Slama.  There are many 
examples of numbers located over the top of notes.  Traditionally 
thistypes of notation  indicate a position that is suggested for 
placement of the slide to play the note, usually to make the passage 
flow easier.  For instance,  Bb above the staff 5th position. These, 
however, have position locations that I have never seen.  For example. 
C in the staff, bass clef 4, D in the staff, 0, E 2, which is the 
normal position, F natural 4, G 0, A 2, B 2, C 4.  Some position 
numbers are underlined as 2 some have line over the number.  Does 
anyone have an explanation for this numbering system?  In other words, 
is this written for trombones in G or Eb, or what?
Any help in this regard would be greatly appreciated.
later,
rf
Randy Fendrick
Southside Chicago Seven
Bakersfield Symphony Orchestra, ret