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                                   June 6, 1977


Mr. D. McColl
Bureau of Mineral Resources
P.O. Box 378
Canberra City, A.C.T., Australia 2601

Dear Don,

    Some years ago you loaned me a collection of 15 australites from Lake Disappointment (24*32'S, 125*13'E). Indetermined their densities and then returned them to you. I am now studying the variation in composition of australites at specific locations, by taking a small slice from each specimen, making a polished thin section, and analyzing it with the microprobe. If you still have the collection (or can obtain it) I would like to borrow the ones circled on the accompanying list for this purpose.

    With best regards.
               Sincerely yours,

                   Brian Mason
                   Department of Mineral Sciences



Transcription Notes:
I wasn't sure how to denote the latitude/longitude degree and minute/second marks.

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