Abstract
LONDON. Mineralogical Society, Nov. 4.—Arthur Russell: An account of British mineral collectors and dealers in the seventeenth, eighteenth, and nineteenth centuries. A first instalment of a series of short biographies dealing with: Nehemiah Grew, F.R.S. (1641-1712), William Borlase, F.R.S. (1696-1772); Rudolf Erich Raspe (1737-1794); and Philip Rashleigh, F.R.S. (1729-1811). M. H. Hey: On cupriferous melanterite from the Skouriotissa mine, Cyprus. A crystallo-graphic study of a well crystallised specimen from an ancient working (perhaps Roman) in the Skouriotissa mine, revealed a very peculiar habit tabular to 6(010), and the presence of the new forms #(161), 2/(231), p7(Il2), q(lO2), and p(150). A partial analysis shows the presence of 7.7 per cent CuSO4,7H2O. C. E. Tilley: On the dolerite-chalk contact-zone of Scawt Hill, Co. Antrim. The production of basic alkali rocks by the assimilation of limestone by basaltic magma. (With chemical analyses by H. F. Harwood): Assimilation of limestone at the contact of a dolerite intrusion with the chalk at Scawt Hill gives rise to a hybrid zone built up of pyroxene-rich rocks (pyrox-enites), titanaugite-melilite rocks, and basic rock-types bearing nepheline (theralite and nepheline-dolerite assemblages). The segregation of a basic alkali residuum is the complementary process in the precipitation of magnesia-rich pyroxene in the pyroxenites. Plagioclase is resorbed and gives place to a titaniferous lime-augite rich in alumina, melilite, and nepheline, while perovskite, aegirine, and wollastonite are other products in the hybrid zone. Frank Smithson: A simple method of observing the magnetic properties of mineral grains. The tests are made with softened steel needles attached to the poles of a horse-shoe magnet, a strong field being obtained when the points are 1 mm. or so apart. The attraction is observed under the microscope. M. H. Hey: On studies of the zeolites (1). General review. A short review of the general properties of the zeolites, with some suggestions on the interpretation of the available data, and a comparison of the zeolites with the clays, ultramarines, permutites, and ‘artificial zeolites’.
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Societies and Academies. Nature 126, 901–902 (1930). https://doi.org/10.1038/126901b0
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DOI: https://doi.org/10.1038/126901b0