It was the first time I had done Charles Law using a dried capillary tube and a bead of conc Sulfuric Acid to determine the volume against the temperature. The experiment took 3 hours, but I now know how to make it faster to fit into an hour lesson. Jacques Charles made a major contribution to the study of gases. In 1787, he discovered that gases have a linear relationship between their volume and temperature, provided the pressure remains constant. This is known as Charles's Law, which states that the volume of a gas is directly proportional to its temperature.