On 7/9/07, Donald Bruce Stewart <dons at cse.unsw.edu.au> wrote: > And he's patented it... > > http://www.patentstorm.us/patents/5355496-description.html Clearly a winner then. :-) T. -- Dr Thomas Conway drtomc at gmail.com Silence is the perfectest herald of joy: I were but little happy, if I could say how much.