🚀 go-pugleaf

        The equipment that I use for measuring tree-ring widths was purchased
        from Velmex Inc.  You can obtain all the information you need by logging

        onto their web page at

                http://www.velmex.com/manual/dendro.htm

        Additional information about tree-ring analysis can be obtained from
        Henri Grissino-Mayer's homepage at

                http://www.valdosta.edu/~grissino/

        or by logging onto the International Tree-Ring Data Bank Forum (for log
        on info send me a message.

        Bob Keeland, USGS
        National Wetlands Research Center
        bob_keeland@usgs.gov
        (318)266-8663