Phase I of the experiment described had a twofold purpose: (1) to determine costs and work out arrangements for a one-month test of the Long Distance Xerography (LDX) telefacsimile system for interlibrary transmission of printed pages between the Berkeley and Davis campuses of the University of California, and (2) to analyze the LDX system in terms of its potential for making possible increased sharing of library resources by regional or intercampus networks of cooperating libraries. A cost analysis was made for several different degrees of usage of the equipment, taking into account staff time, equipment costs and supplies, and the general set of conditions which must exist before the LDX system is used to advantage was found. From the preliminary analysis the following conclusions were reached: (1) the LDX system appears to be capable of providing rapid, high-quality transmission of printed pages rom one library to another, with elapsed time for each transaction averaging 2.5 hours instead of the week or more typically required; (2) the cost of an LDX system precludes its use in libraries at current interlibrary photoduplication service levels; and (3) there is great potential of expanding access to existing large serials collections by establishing an LDX network serving several libraries, each with smaller collections of the more frequently used titles. (CM)