Author's Address

Mail:     Gerard Hammond
             c/o Dept. of Chemistry

          University of New England
             Armidale NSW 2351
             Australia

e-mail:   ghammond@metz.une.edu.au

I hope you find this programme as useful as I do.
                      best regards,

                      Gerard

p.s. 
Special thanks to all the helpful people who read and answer questions on the Internet newsgroup comp.sys.mac.programmer.
p.p.s
The "Pro" bit is a joke. Plus there is a secret message hidden on the Data Window. See if you can find it.
d.s