Nordhausen the Augustines, Franciscans and Dominicans. Agriculture plays an important role to the present day. Approximately 57% of the municipal territory is in agricultural use. Cereals from the region are used in the making of a famous local spirit, the "Nordhäuser Korn". Historically, sulfuric acid produced by the distillation of green vitriol (iron(II) sulfate) was known as Nordhausen oil of vitriol. The primary industry of Nordhausen is in the production of heavy machinery. The region had a factory for the production of rail engines until 1942. Later the region's plants produced truck motors, augers and excavators. Today, engineering is still the
Tung oil to dry to a fine wrinkled finish; the US name for this is gas checking: this property was used to make wrinkle finishes, usually by adding excess cobalt drier. To stop this, the oil is heated to gas-proof it, and most oils used for coating are gas-proofed, also known as "boiled". The name is often used by paint and varnish manufacturers as a generic name for any wood finishing product that contains the real tung oil and/or provides a finish that resembles the finish obtained with tung oil. The tung oil tree originates in southern China and was cultivated there