This report continues our survey of the Soviet effort in underground coal gasification and summarizes the research conducted at Lisichansk from 1948 to 1963. This facility was operated primarily as an experimental-industrial station, and techniques for in situ coal gasification were developed and improved during this period. The stream method of gasification, which required mined shafts, was investigated first. By the late 1950's, improvements in methods and equipment enabled the Soviets to recover coal reserves at Lisichansk efficiently without using underground labor to create the necessary channels. This report discusses the geological, hydrological, chemical, technological, and economic factors affecting the construction, process optimization, operation, and maintenance of in situ gas generators. The available data for individual generators operated at Lisichansk during this period are also presented.