>> I suppose Montgolfier, et al, doesn't count... > No. Not to discount the achievements of the Montgolfiers, but they do not count in this discussion. I guess that settles that. If there's a Gaul in my woodpile it's news to me, but I suspect manned flight was yet another catalyst for the spawn of 18th Century rationalism - Science, and Engineering... Jack -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist