Hi David. Thanks for bringing that up. The best advice indeed. I have the journal on CD myself and cant underline enough how handy its been. There are so many good articles to draw on its redouglulous ! For ordens sake... I would perhaps only get permission to copy off the bit on the pendulum analogy anyways... so if you can see your way to buying the Journal on CD... by all means do so. RicB Ric: You mentioned Jim Ellis' article in the September 1982 Journal and offer to send it to people if you can get permission. Anyone can have a copy of that article if they purchase the 20 year Journal CD-rom which is available at https://www.ptg.org/store/product_info.php?cPath=22&products_id=44 dave David M. Porritt dporritt at smu.edu
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