Robbie commented:

>[ But the big problem is not the gas, it's the liquid, a kerosene-like
>[ plasticizer, which oozes out of poor quality vinyl to the outside
>[ and inside of the hoses.  Then dust quickly collects.

But why, then, is clear plastic tubing used in so many small organs
I have seen ("all", I would guess, although I did not really pay
attention to this detail up to now)?

Just curious!

Harald M. Mueller
Grafing bei Muenchen
http://www.haraldmmueller.de/

 [ It's undoubtedly of better quality than the junk I've seen in player
 [ pianos that were rebuilt 30 to 40 years ago.  Maybe the clear plastic
 [ tubing used in organs is not vinyl.  -- Robbie