> take out, shake the bottle once, and it turns from clear to opaque. What happens to the temperature of the super-cooled liquid when it changes state? IOW, is the heat of fusion given up at the normal freezing temp, or at the actual transition from liquid to solid ... ? Jack -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist