A facility is described which has been developed at the Stanford Synchrotron Radiation Laboratory for the rapid acquisition of structural information from a sample pressurized in a diamond-anvil cell and cooled to cryogenic temperatures. The system employs a closed-cycle He-refrigerator which can be continuously operated, independent of any liquid cryogens, from a remote control station. The compressive contact force between the diamond anvils, and hence the sample pressure, is also externally controlled. Preliminary data on the critical points and volume changes associated with the pressure/temperature induced isomorphic phase transition in Ce//. //8La//. //1Th//. //1 are presented.