Sentence Examples

  • Plumbago or graphite is largely used in the production of crucibles, not in the pure state but in admixture with fireclay; the proportion of the former varies with the quality from 25 to nearly 50%.
  • Minerals produced in small quantities include gypsum, millstones, salt and sandstone, and among those found but not produced (in 1902) in commercial quantities may be mentioned allanite, alum, arsenic, bismuth, carbonite, felspar, kaolin, marble, plumbago, quartz, serpentine and tin.
  • Copper ore is found in many tracts throughout India, plumbago in Madras, and corundum in southern India.
  • Iron is abundant and plumbago is worked.
  • In the mountains near Nanking, coal, plumbago, iron ore and marble are found.

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