Gas laws 1662 Robert Boyle studied the relationship between volume and pressure of a gas of fixed amount at constant temperature. He observed that volume of a given mass of a gas is inversely proportional to its pressure at a constant temperature. Boyle's law, published in 1662, states that, at constant temperature, the product of the pressure and volume of a given mass of an ideal gas in a closed system is always constant. It can be verified experimentally using a pressure gauge and a variable volume container. It can also be derived from the kinetic theory of gases: if a container,
Anglo-Irish people in part and Catholic but had converted to Anglicanism. The term "Anglo-Irish" is often applied to the members of the Church of Ireland who made up the professional and landed class in Ireland from the 17th century up to the time of Irish independence in the early 20th century. In the course of the 17th century, this Anglo-Irish landed class replaced the Gaelic Irish and Old English aristocracies as the ruling class in Ireland. They were also referred to as "New English" to distinguish them from the "Old English", who descended from the medieval Hiberno-Norman settlers. A larger but less