Jaycor engaged in a survey project for ERDA's Morgantown Energy Research Center to ''obtain and organize information on current programs, experimental techniques, and unresolved problems''in research on sorption, attrition, and distribution in fluidized bed combustors, and to make recommendations for a program of research appropriate to the Morgantown Energy Research Center's Atmospheric FBC facilities. The central purpose of this survey was not so much to make a comprehensive review of FBC research activity, as to seek out and ''highlight''areas in which MERC personnel and facilities can make unique and significant contributions. In this regard, the development, testing and utilization of in-bed instrumentation for cold- and hot-flow FBC systems grew to be a unifying theme. It is an activity which most of the organizations contacted felt would benefit their programs, but which only a few were undertaking. The technology now appears capable of supporting such an effort, so in-bed instrumentation may be ''an idea whose time has come.''The internal variables of interest include temperature, pressure, gas velocities, particle velocities, local voidage, gas composition, particle composition and size distribution, as well as corrosion-erosion rates and heat transfer coefficients.