> > Bob Perrin and Hervey Bagot did some research on this, the reference > is Perrin, R., Swallowe, G. M., Charnley, T., Marshall C. "On the > debossing, Annealing and Mounting of Bells" in Journal of Sound and > Vibration (1999) 227 (2), pp 409-425. How do I get a copy of this? (Or ould you please send me a photocopy) GAD