Constant volume gas thermometer
. The mercury reservoir R is so adjusted that the mercury in the branch B of the U-tube is at a fixed reference mark E to keep the confined gas at a constant volume. Then, we read the height of the mercury in the A branch. The pressure of the confined gas is the difference of the heights of the mer..
. The mercury reservoir R is so adjusted that the mercury in the branch B of the U-tube is at a fixed reference mark E to keep the confined gas at a constant volume. Then, we read the height of the mercury in the A branch. The pressure of the confined gas is the difference of the heights of the mer..