My OLD dictionary defines "slip" as " Potter's clay in liquid state, used in the casting process and for decoration, or as a cement." which doesn't really answer your question. My only knowledge of "slip" is when a slip is applied to American Indian pottery over the baked pot, to provide a background and/or smooth surface on which to apply the design. Maybe there's someone out there who still works in business who could give us a clue. - Leah in Texas Melissa Lee wrote: > Hi, > I was wondering if someone could help me. On the 1910 census, it looks like my ggrandfather worked in the Pottery business as a slipper. Does anyone know what exactly a slipper was?