Black Chalk

: ON THE NEUTRAL, BLACK.

is an indurated clay, of the texture of white chalk, and chiefly used

for cutting into crayons. Fine specimens have been found near Bantry in

Ireland, and in Wales, but the Italian has the most reputation. Crayons

for sketching and drawing are also artificially prepared, which are

deeper in colour and free from grit. Wood charcoal is likewise cut into

crayons, that of soft woods, such as lime, poplar, &c., being best

adapted for the purpose.



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