"The way in which whisky matures is influenced by the style and location of the warehouse. Wherever it matures the whisky ‘breathes’ through the cask, losing two per cent of its volume each year, and this is known as ‘The Angel’s Share’."
— http://www.amazon.com/gp/aw/d/1857326830/ref=redir_mdp_mobile/188-4148784-2513117
