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Text File  |  1992-09-02  |  217b  |  7 lines
  1. Type of clay, consisting mainly of
  2. montmorillonite and resembling fuller's
  3. earth, which swells when wet. It is used in
  4. papermaking, moulding sands, drilling muds
  5. for oil wells, and as a decolorant in food
  6. processing.
  7.