Sentence:  To each hogshead of genuine Bordeaux wine, there are four gallons of Benicarlo, half a gallon of <WSD>stum</WSD> wine, and a small quantity of Hermitage added, which mixture undergoes a slight fermentation, and is then exported under the name of claret. 
Meaning of the word marked with <WSD> tags:  Wine revived by new fermentation, resulting from the admixture of must.