>>> Paul Tyree <mrpmt@empire.net> 10/01/97 09:28pm wrote: The term, pig, refers to a mold, or a metal casting from a mold. Lead shields are almost always poured mold castings, and are, hence, pigs. >>>>> Now the question is: why are molds and casting called "pigs" (This may not be directly radiation-related, but it is technical and interesting) J P Davis joyced@dnfsb.gov