Another experiment discussed in Cooking for Geeks is using sugar to calibrate you oven and oven thermometers. Sucrose (table sugar) melts at 367 degrees F.This means if you set an oven-proof dish of sugar in the oven set at 350 it should not melt. But it you turn it up to 375, it should. Looked at the other way around, if you keep creeping up the temperature until the sugar melts and mark that spot, you have 367.
