Ireland 2012 350th Anniversary of the formulation of Boyle's Law.

The An Post of Ireland released a stamp on 5 July 2012 celebrating the 350th anniversary of the formulation of Boyle's Law, a law so very important to understand in scuba diving. The stamp shows a portrait of Robert Boyle (1627-1691) on the left, with his famous formula together with an illustrative graph on the right. Boyle’s Law, first published in 1662, states that for an enclosed volume of gas the pressure varies inversely with the volume while the temperature is kept constant.