>> I'm trying to get a feel for the "normal" range of atmospheric >> pressure. Looking at a range of met weather forecast charts should do the trick. On some at least the magnitude of highs and lows are shown. Met experts or weather services can also probably answer this question directly. RM -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist