As the collection manager for the U.S. National Collection I have a constant need to refer to the volumes of The System of Mineralogy of J.D. and E.S. Dana. As with almost every major collection, private and public, the National Collection is arranged according to the Dana System. The arrangement of the National Collection is based on the sixth and seventh editions due to the lack of a silicate volume in the seventh edition. Answering public inquiries concerning minerals is made easier having the Dana volumes there for quick reference. Finally, when a researcher requests a certain composition for a...

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