Whose law relates the pressure and volume of a gas?

In 1662 Robert Boyle described the relationship that at a fixed temperature, the pressure of a gas increases as its volume decreases, and vice versa, so that pressure multiplied by volume stays constant. If you squeeze a gas into half the space, its pressure roughly doubles. Boyle reached this conclusion through careful experiments using tubes of trapped air and mercury. His law was one of the first quantitative descriptions of the behaviour of gases and helped establish chemistry as an experimental science. It remains a cornerstone of the gas laws taught today.