plumbago

How to use plumbago in a sentence

• We have likewise found a vein of plumbago, which was an object of search, on the supposition that it was coal.

  Life of Richard Trevithick, Volume II (of 2) | Francis Trevithick

• Red hermatite, iron ore, traces of copper, and plumbago are found along the main Bitter Root.

  The Atlantic Monthly, Volume 17, No. 101, March, 1866 | Various

• Even fresh, natural fruits that have been evenly coated with plumbago may be covered with a thin shell of metal.

  Steam Steel and Electricity | James W. Steele

• Iron acquires some little weight by being converted into steel; and when dissolved in acid, it yields more plumbago.

  Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry | Joseph Priestley

• The most common solid employed as a lubricant is graphite, sometimes termed “plumbago” or “black lead.”

  Aviation Engines | Victor Wilfred Pag