Porter is a type of ale which has a malting aroma and hop bitterness. It is generally strong and dark and brewed with soft rather than hard water.
In 18th Century London a beverage consisting of a third of a pint of ale, beer and twopenny (the strongest beer, costing twopence a quart. Harwood, a brewer, brewed a beer called Entire which blended all three in about 1720. It started to be called Porter because it was especially popular among the porters of 18th century London. Extra-strong porter was called Stout-Porter and eventually became stout.
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