From the submarine to Guinness - top ten surprising Irish inventions for St. Patrick's Day

A tourist drinks a pint of Guinness in the Gravity bar at the Guinness Storehouse, Dublin

It was soon adopted by the Royal Air force as a standard safety device.

10.    Apparatus for whiskey distilling

A Dublin chap with a very exotic name, Aeneas Coffey, came up with the world first heat-exchange device in 1830. This might not sound like that big a deal but this very efficient little piece of equipment led to huge advances in distilling, including whiskey.

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