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Figure 47  Fused jar fragments, Benjamin DuVal Pottery, Richmond, Virginia, 1811–1820. Salt-glazed stoneware. (Photo, Gavin Ashworth.) These jar fragments, which partially melted during a firing, provide direct evidence of the stacking methods used in the kiln. Note the fire-clay spacers used between the jar mouths. Jars were stacked base to base and mouth to mouth.