Richard, you've got it wrong. Leon Foucault first of oall didn't do the Foucault test as we are doing it today (he actually just figured for an ellipsoid) but he used a candle for a light source. Bob May bobmay@nethere.com http://nav.to/bobmay http://bobmay.astronomy.net _______________________________________________ ATM mailing list http://www.atmlist.net/