Irish whiskey Act, whiskey produced by registered distillers was known as "Parliament whiskey", while that produced by illicit producers was, and still is referred to as "Poitín", a Gaelic term meaning "small pot" (often anglicised as poteen) in reference to the small pot stills used by the illicit distillers. However, although traditionally the product of illicit production, many legal varieties of "Poitín" have come to market in recent years. In the 18th century, demand for whiskey in Ireland grew significantly, driven both by strong population growth, and by displacing the demand for imported spirits. Growth in the latter is very much visible
Irish whiskey Thomas Street Distillery, had an output exceeding 2 million gallons per annum. By 1878, the reputation of Dublin whiskey was such that Distillers Company Ltd., a Scottish distilling firm, having built a distillery in Dublin, claimed that Dublin whiskey could sell for a 25% premium over other Irish whiskey, and that it had a demand five times that of Scotch at the time. Although these figures are likely inflated, they give an indication of the esteem in which Dublin whiskey was held, even by Scottish distillers. During this period, the four largest Dublin distilling firms, of John Jameson, William Jameson,