Boyle's law of the gas, and "k" is a constant. The equation states that the product of pressure and volume is a constant for a given mass of confined gas and this holds as long as the temperature is constant. For comparing the same substance under two different sets of conditions, the law can be usefully expressed as The equation shows that, as volume increases, the pressure of the gas decreases in proportion. Similarly, as volume decreases, the pressure of the gas increases. The law was named after chemist and physicist Robert Boyle, who published the original law in 1662. This relationship
Francis Hauksbee In 1708, Hauksbee independently discovered Charles's law of gases, which states that, for a given mass of gas at a constant pressure, the volume of the gas is proportional to its temperature. Hauksbee published accounts of his experiments in the Royal Society's journal "Philosophical Transactions". In 1709 he self-published "Physico-Mechanical Experiments on Various Subjects" which collected together many of these experiments along with discussion that summarized much of his scientific work. An Italian translation was published in 1716. A second edition was published posthumously in 1719. There were also translations to Dutch (1735) and French (1754). The Royal Society Hauksbee