Gain Notes for Revolution 424 JEM-X1: A quite normal revolution with fine gain fitting. All the data from this revolution should be useable. The Xe analysis confirms that the energy determination for this revolution is good, within about 2% of the ideal. However, as for all revolutions, the first few science windows should be avoided in any analysis requiring very good gain determination. One big and two smaller glitches on source 1 (black/red) have pulled the smoothing down somewhat at the beginning of the revolution, but the effect on the science data is negligible given the averaging over all four calibration sources. JEM-X2: No scientific data or gain history data for this unit. CAO 3/07/2008