Proceedings of the United States National Museum . Photomicrographs of Albitic Pegmatite For explanation of plate see page 86 U. S. NATIONAL MUSEUM PROCEEDINGS, VOL. 68, ART. 2 PL. 8. AUGITE BLADES IN DIABASE PEGMATITE For explanation of plate see page U. S. NATIONAL MUSEUM PROCEEDINGS, VOL. 66, ART. 2 PL. 9

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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience