Carbon
A simple combustible, which constitutes a large proportion of all animal and vegetable substances. We are familiar with it in the diamond, and the various kinds of charcoal, mineral coal, lampblack, etc. Carbon unites with all the simple combustibles. With iron it forms steel and plumbago, and with copper it forms a carburet. The diamond is the purest form of carbon. See DIAMOND; GRAPHITE; CHARCOAL; CAST IRON; STEEL.