12 April 1993 The accompanying ASCII files contain summaries of cosmic ray elemental and isotopic composition in the vicinity of Earth as measured by the high energy cosmic ray experiment on ISEE-3/ICE (NSSDC ID# 78-079A-05). These measurements refer to the time interval from August 1978 to April 1981 and to particle energies in the general range 50 to 500 MeV/nucleon. The contents of the files are as follows: TABLE1.TXT Elemental Abundance Ratios TABLE2.TXT Isotopic Fractions TABLE3.TXT Isotopic Abundance Ratios Each file also lists the references in which the measured values were published. Questions concerning the contents of these files can be addressed to: Mark E. Wiedenbeck Mail Stop 169-327 Jet Propulsion Laboratory 4800 Oak Grove Drive Pasadena, CA 91109 Internet > mew@heag1.jpl.nasa.gov PH: 818-354-7168 FAX: 818-354-8895