 We're going to put the Galusax device into a boiling water bath. We'll wait a few minutes so that the gas inside the sphere reaches the same temperature as the bath. We will then read the temperature of the water bath and the pressure off the gauge. The temperature is 100.0 degrees Celsius. The pressure is 948 millimeters of mercury. We now have a bath which is a mixture of boiling water and room temperature water. The temperature is 51.5 degrees Celsius. The pressure is 838 millimeters of mercury. We will now put the Galusax device in a bath of room temperature water. The temperature is 24.0 degrees Celsius. The pressure is 770 millimeters of mercury. We will now put the Galusax device in a mixture of ice and water. After a few minutes, the temperature is 0.0 degrees Celsius. The pressure is 715 millimeters of mercury. Now we will put the Galusax device into liquid nitrogen. We will not use a mercury thermometer to record the temperature since mercury freezes at minus 33 degrees Celsius. We will rely on the fact that the liquid nitrogen will be at its boiling point which is minus 197 degrees Celsius. The pressure is 230 millimeters of mercury.