> Ask your dentist if he has one he wants to get rid of. (Your dentist is
> also a great source of dental picks - he throws away dozens every month.)

Older units cannot be used dry. The transducer in the handpiece
requires water for cooling, and if used dry will eventually fail...
not coincidentally becoming uncomfortably hot to hold!

Newer units with piezoceramic transducers apparently do not suffer
from this problem and I'm told can be used dry, which is a necessity
with many fossils.


--
Regards
Andrew Grebneff
Dunedin, New Zealand
Fossil preparator
Mollusc, Toyota & VW van fanatic

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