Proceedings of the United States National Museum . Photomicrographs of Diabase Pegmatite For explanation of plate see pages 85 and 86 U. S. NATIONAL MUSEUM PROCEEDINGS, VOL. 66. ART. 2 PL. 6. Albitic Pegmatite in Diabase For explanation of plate see page U. S. NATIONAL MUSEUM PROCEEDINGS, VOL. 66, ART. 2 PL. 7

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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience