MULLER, or Mullar, denotes a stone flat and even at the bottom, but round at the top, being used for grinding substances on a marble. The apothecaries use mullers to prepare many of their testaceous powders; and painters for their colours, either dry or in oil.
MULLER is also an instrument used by the glass-grinders, being a piece of wood, to one end of which is cemented the glass to be ground, whether convex in a basin, or concave in a sphere or bowl. The muller is commonly
about six inches long, and rounded by turning; the cement used is composed of ashes and pitch.