Bartol Research Institute
                                          University of Delaware
                                          Newark, Delaware  19716

                                          20 July 1994

        Dear Colleague:

        This disk contains 1992 station data from the University of
        Delaware Bartol Research Institute network of neutron
        monitors.  Each of the four stations has its own data file:

        SP.DAT     South Pole, Antarctica
        MC.DAT     McMurdo, Antarctica
        TH.DAT     Thule, Greenland
        NE.DAT     Newark, Delaware

        Within each data file, the corrected-for-pressure count
        rate, uncorrected count rate, and pressure data are listed
        by month in the same format as in the data book.

        The Bartol neutron monitor network is operated with support
        from the U.S. National Science Foundation under grants
        OPP-9219761 and ATM-9314683. Data on this disk may be freely
        copied provided that this notice is included verbatim in all
        such copies.

        Scientific questions pertaining to the data on this disk
        should be addressed to:

        Professor John W. Bieber
        Bartol Research Institute
        University of Delaware
        Newark, DE  19716

        (302) 831-2240

        E-mail via SPAN -- BARTOL::JOHN (or 6360::JOHN)
        E-mail via Internet -- john@bartol.udel.edu

        While these data are accurate to the best of our knowledge
        as of the date of preparation (20 July 1994), we reserve
        the right to correct errors without notifying possible
        recipients of these data.

        Sincerely,

        John W. Bieber
        Paul Evenson