On Sat, 3 Dec 2005, Russell McMahon wrote: > Physical effects can last for days. > Makes one wonder (just a wee bit) about homeopathy Not really but Reynolds et al discovered that it helped to let the water rest a few days in their apparatus before using it (to determine what was later known as Reynolds numbers). Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist