CHALK n.
Finely prepared chalk, used as a drawing implement; also, by extension, a compound, as of clay and black lead, or the like, used in the same manner. See Crayon. Black chalk, a mineral of a bluish color, of a slaty texture, and soiling the fingers when handled; a variety of argillaceous slate. -- By a long chalk, by a…
CHARCOAL n.
Finely prepared charcoal in small sticks, used as a drawing implement. Animal charcoal, a fine charcoal prepared by calcining bones in a closed vessel; -- used as a filtering agent in sugar refining, and as an absorbent and disinfectant. -- Charcoal blacks, the black pigment, consisting of burnt ivory, bone, cock, pea…