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                          June 20, 1977


Mr. D.R. Gregg
Tasmanian Museum and Art Gallery
GPO Box 1164M
Hobart, Tas., Australia  7001

Dear Don,

     I am writing to solicit your aid in a current research project of mine.  I am making an extensive survey of the variations in chemical composition of australites, both within single localities and between geographic regions.  I have ample collections from the mainland but nothing from Tasmania.  If you have a collection of Tasmanian australites in your museum (not Darwin glass, I have plenty of that), could I borrow it in whole or part for non-destructive examination-density determination of individual specimens?  This will indicate the range of composition represented.  I may then ask permission to make polished thin sections from individual specimens, which could be quantitatively analyzed with the microprobe.

     Hope all goes well with you.  Regards and best wishes.


                         Brian Mason
                         Department of Mineral Sciences

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