An encyclopedia article on the art of dyeing from an early 19th-century English-language reference work. It explains the chemistry of dyeing, the role of mordants, and the primary colours, then gives vat and bath procedures for blue (woad and indigo), red (scarlet, crimson, madder), yellow, fawn (walnut bark and root), and black. Later pages give general recipes for wool and silk and describe a method of fixing alumina mordants with an oily alkaline solution to dye cotton and linen a fast red.