rwg>The terser "What's the largest capacity pie tin you can make from a square foot of sheet metal?" is only biquadratic. Unless I've erred, it's 12.06" across, 2.89" deep, with only a 5.46" bottom, and holds a human blood supply(!?) (6.02qt). I erred. The hemispherical ideal, radius = depth = 4.79", holds only 3.98 qt. I got the base diamter right (5.46196"), but the top is 9.95648", and the depth is a more satisfyingly hemispherical 4.44215". Volume is a more plausible 3.692178 qt. The dimensions are still biquadratics/sqrt pi, but they factored out of much higher degree polynomials from clearing radicals and eliminating. --rwg __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com