a name for all coloured stones, earths, or other minerals used in designing or painting in pastel. Crayons may be made of any colour, and adapted for the faces of men, women, landscapes, clouds, sunbeams, buildings, and shadows, in the following manner: Take platter of Paris, or alabaster calcined, and of the colour of which you intend to make your crayons, a sufficient quantity: grind them first aflutter, and then together, and with a little water make them into a paste: then roll them with your hand upon the grinding stone into long pieces, and let them dry moderately in the air: when they are to be used, scrape them to a point like a common pencil.