The Energy Research and Development Administration (ERDA), Division to Geothermal Energy (DGE), desires to receive and consider for support, if appropriate, proposals for improving and developing well logging tools, instruments, and materials suitable for use in exploration and production boreholes, primarily for geothermal applications. Individuals, corporations, companies, educational institutions, non-profit or not-for-profit institutions, and others, individually or as proposed project teams, who wish to have their projects considered should respond to this Program Research and Development Announcement (PRDA) which is a part of a coordinated National Energy Research and Development program