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INDIAN INSTITUTE OF TECHNOLOGY KANPUR II T POST OFFICE, KANPUR-16, INDIA DEPARTMENT OF CHEMISTRY Chem/PSG/^[[140]] September 5, 1972 Dr. Brain Mason Smithsonian Institution Washington, DC 20560 U.S.A. Dear Dr. Mason: Enclosed is another list of meteorites, mostly irons, from which we would very much like to have samples. We are already having about 16 samples (mostly stones) from you. Most of these are under investigation at present. As you may be well aware, Carleton Moore's group has measured nitrogen in a large number of irons. They took [[underlined]]milled[[/underlined]] samples for study. We have seen very wide variations in nitrogen concentrations even in adjacent pieces of the same iron meteorite. This interesting information is lost in the technique of the earlier workers. It is therefore necessary to examine a number of iron meteorites with the new technique with a hope to find some meaningful correlation among various classes. It is with this view that I am requesting you to send us these samples. Moreover, we get this valuable data with only marginal additional inputs in terms of costs and efforts. Myself and my students will be highly grateful to you for your encouragement and support. For customs purposes kindly mark "No Commercial Value", "Meteorite Sample", "Free Gift" etc. If convenient, you may kindly send us samples in small batches, as these get ready. With best regards, Sincerely yours, ^[[PSGoel]] P.S. Goel Head, Dept. of Chemistry Encl. list of meteorites