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  • Food processing: pounding yam
  • Processing of iron. Engraving.
  • Processing of mercury. Etching.
  • Food processing: threshing cereals
  • Processing of bismuth. Etching.
  • Processing of alum. Etching, 1769.
  • Furnace used in processing arsenic. Etching.
  • Processing of bismuth. Etching by Bénard.
  • Processing language, left brain hemisphere (sagittal view)
  • A furnace used in the processing of iron. Engraving.