Marsala wine Marsala wine Marsala is a wine, dry or sweet, produced in the region surrounding the Italian city of Marsala in Sicily. Marsala first received "Denominazione di Origine Controllata" (DOC) status in 1969. The DOC status is equivalent to PDO: most countries limit the use of the term "Marsala" to those wines that come from the Marsala area, to which the European Union grants Protected Designation of Origin (PDO) status. While the city's natives sometimes drink "vintage" Marsala, the wine produced for export is universally fortified similar to Port, Madeira and Sherry. Originally, this addition of alcohol was to ensure that
An Experimental Enquiry Concerning the Source of the Heat which is Excited by Friction An Experimental Enquiry Concerning the Source of the Heat which is Excited by Friction "An Experimental Enquiry Concerning the Source of the Heat which is Excited by Friction" (1798), which was published in the "Philosophical Transactions of the Royal Society", is a scientific paper by Benjamin Thompson, Count Rumford that provided a substantial challenge to established theories of heat and began the 19th century revolution in thermodynamics. Rumford was an opponent of the caloric theory of heat which held that heat was a fluid that could be neither created nor destroyed. He had further developed the view that all gases