Boosey’s “Scale of Fingering for R.S. Pratten’s Perfected Cone Flute” (they don’t make titles like that anymore!) is actually very interesting on this topic. It lists four fingerings for C#5, numbered as 1 to 4, presumably in order of preference. They are:
- o’oo ooo ,
- o’xx xxx ’
- o,oo ooo ,
- ooo xxx ,
Confused? Fair enough, let me walk you through them…
- Everything open including Thumb C (Thumb C?!!!) (i.e. fully vented)
- Low C# fingering but with L1 and Thumb C open (i.e. 2nd harmonic)
- Everything open including R1 C (i.e. fully vented)
- Everything open except for right hand holes. (probably for fast passages)
So, this is an example of a fingering chart that anticipates opening a c key for c#, but it’s (preferably) not the c key we have. One of Pratten’s improvements was to add a thumb operated C key with its touch beside the regular Thumb Bb. Because of these two touches, there is no remaining real estate for supporting the flute with your L thumb, so you are pretty much forced to adopt the three-point-grip defended by Rockstro, and often wrongfully attributed to him. Once you adopt that grip, your left thumb can hang in the breeze or press either C or Bb touch at will.
Of this key, Pratten says:
“The new thumb C key cannot be too highly estimated, and I should recommend every Flautist to acquire its use; it will cost but a few days practice to become perfectly familiar with it. Indeed by playing slow music at first, and using no other fingering for C [natural], I doubt not but that one day’s careful study of it, will be sufficient to enable the player to use it with facility.”
[Note I had to put the word “natural” after C as I don’t seem to have a natural sign available. Where does one find that?]
Putting that altogether, Pratten would probably agree with both Jem and Dave. On his flute you ideally should open a C key for C#, but he recognises that’s sometimes hard using the regular R1 C (which is why he puts it at 3rd preference). If you have a spare L thumb, here’s a good use for it.
Mr Boehm of course had been advocating the same solution since 1832, excepting he went for the Release-to-Open option, rather than Pratten’s Press-to-Open.
The rest of Pratten’s fingering chart is available at:
http://www.mcgee-flutes.com/PratFing.htm
Terry