Take a look here: http://en.wikipedia.org/wiki/Thermal_diffusivity
-John =========== > The thermal conductivity of cast iron is relatively poor for a metal. > Water has even lower thermal conductivity however this can be overcome > by stirring. > > Bruce _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.