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Figure 44  Jug and stacker collar, John P. Schermerhorn, Richmond, Virginia, ca. 1830. Salt-glazed stoneware. H. 14". (Private collection; photo, Gavin Ashworth.) Although it was not produced at the DuVal pottery, this Richmond-made jug illustrates the placement of the stacker collar over the mouth and neck of the jug. The stacker is designed to provide a level surface on which to place another jug. The hole in the stacker allows the gases to escape from the jug’s interior. Note the indentations on the jug’s shoulder where the stacker made contact.