Etna DOC affects the maturation of the grapes and therefore there is a significant difference between the harvest period of the Etna and the rest of the Sicily areas. The soil is volcanic and very rich in minerals. It is formed by the disintegration of one or several types of lava of different ages and eruptive materials such as lava, ash and sand. Containing all these particles, the crops cultivated on Etna soil benefit from nutrients like iron, copper, phosphorus, magnesium and others. Etna DOC Etna is a "Denominazione di origine controllata" (DOC) for wine from the Etna region in Italy. Etna
Etna Furnace (Williamsburg, Pennsylvania) the foundation of a tally house, a blacksmith shop (c. 1831), bank barn (c. 1831), foundation of a boarding house, three family tenant house, two iron master' mansions (one destroyed), a store and paymaster's office (c. 1831), Methodist / Episcopal Church (1860), and cemetery with graves dating between 1832 and 1859. It was added to the National Register of Historic Places in 1973, with a boundary increase in 1991. Etna Furnace (Williamsburg, Pennsylvania) Etna Furnace, also known as Mount Etna Furnace, Aetna Furnace, and Aetna Iron Works, is a historic iron furnace complex and national historic district located at Catharine