Mineralogical magazine and journal of the Mineralogical Society: Volume 18 -

A butterfly-twin of Gypsum 1
L. J. Spencer
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14 March 2018, pp. 82-86
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The specimen here described was acquired in 1913 for the mineral collection of the British Museum. It came from one of the numerous sulphur mines in the province of Girgenti, Sicily. Being of some size (15 cm. = 6 inches across) and with the two individuals well separated and symmetrically disposed, it affords a striking illustration of a twin growth. The crystal is colourless and perfectly transparent; it encloses one or two small patches of native sulphur and compact limestone. A portion, probably about one-third, of the original specimen has been broken away along the perfect cleavage of gypsum ; and this fact, together with the amall point of attachment, increases the resemblance of the twin to tbe butterfly form, which is here more striking than in the so-called butterfly-twins of calcite.

Obituaries
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14 March 2018, pp. 136-144
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MMA volume 18 issue 85 Cover and Front matter
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14 March 2018, p. f1
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Mining Engineers' Handbook. Edited by Robert Peele. Pp. x+2375, illustrated. First edition. (New York : John Wiley & Sons, Inc.; London: Chapman & Hall, Ltd., 1918. Price 23s. net.)
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14 March 2018, pp. 401-402
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Economic Geology. By Heinrich Ries. Pp. xviii + 856, with 75 plates and 291 text-figures. Fourth edition. (New York: John Wiley and Sons, Inc. ; London: Chapman & Hall, Ltd. 1916. Price $4.00 = 17s. net.)
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14 March 2018, p. 145
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The Banket. A study of the auriferous conglomerates of the Witwatersrand and the associated rocks. By Robert B. Young. Pp. xv+125, with 28 plates and 1 text-figure. (London: Gurney & Jackson. 1917. Price 8s. 6d. net.)
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14 March 2018, p. 146
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Introduction to the Rarer Elements. By Philip E. Browning. Pp. x + 250, with coloured plate of spectra. Fourth edition. (New York : John Wiley & Sons, Inc. ; London: Chapman & Hall, Ltd., 1917. Price 7s. net.)
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14 March 2018, p. 402
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A Study of the Magmatic Sulfid Ores. By C. F. Tolman and Austin F. Rogers. Pp. 76, with 20 plates and 7 text-figures. (Leland Stanford Junior University Publications, University Series. 1916. Price $1.00.)
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14 March 2018, p. 147
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A Manual of Geometrical Crystallography treating solely of those portions of the subject useful in the identification of minerals. By G. Montague Butler. Pp. viii + 155, with 107 text-figures. First edition. (New York : John Wiley & Sons, Inc. ; London : Chapman & Hall, Ltd., 1918. Price $1·50 = 7s. net.)
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14 March 2018, pp. 402-403
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The Magic of Jewels and Charms. By George Frederick Kunz. Pp. xv + 422, with 56 plates and 29 text-figures. (Philadelphia and London : J. B. Lippincott Co. 1915. Price $6.00 net.)
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14 March 2018, p. 147
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Practical Instructions in the search for, and in the determination of, the useful minerals, including the rare ores. By Alexander McLeod. Pp. xxvii + 254. Second edition. (New York : John Wiley & Sons, Inc. ; London : Chapman & Hall, Ltd., 1917. Price 8s. 6d. net.)
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14 March 2018, p. 403
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Index to Vol. XVIII
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14 March 2018, pp. 404-408
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The Prodromus of Nicolaus Steno's Dissertation concerning a solid body enclosed by process of Nature within a solid. An English version with an introduction and explanatory notes by John Garrett Winter, with a foreword by William H. Hobbs. University of Michigan Studies, Humanistic series, vol. xi, part II, 165-283, with 7 plates. 1916. (New York: The Macmillan Company. Price $1.30 net.)
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14 March 2018, pp. 147-148
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Os Satellites do Diamante. By Eugenio Hussak:. Pp. 56, with 3 maps (Rio de Janeiro: Serviço Geologico e Mineralogico do Brazil. 1917.)
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14 March 2018, p. 148
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Errata
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14 March 2018, p. 409
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Bibliography of Yorkshire Geolopy. By T. Sheppard. Pp. xxxvi + 629. (London, Hull, and York : A. Brown & Sons, Ltd. 1915. Price 15s.)
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14 March 2018, p. 148
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MMA volume 18 issue 87 Cover and Front matter
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14 March 2018, pp. f1-f2
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Bibliography of Australian Mineralogy. By C. Anderson. Pp. 164. Mineral Resources, No. 22, Geological Survey, New South Wales. (Sydney, 1916. Price 2s. 6d.)
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14 March 2018, p. 149
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Microscopic Determination of Opaque Minerals, an aid to the study of ores. By Joseph Murdoch. Pp. vii+105, with 1 coloured plate and 9 text-figures. (New York: John Wiley & Sons, Inc.; London : Chapman & Hall, Ltd. 1916. Price 9s. 6d.)
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14 March 2018, pp. 149-150
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A Pocket Handbook of Minerals designed for use in the field or class-room, with little reference to chemical tests. By G. Montangue Butler. Pp. ix+311, with 89 text-figures and 5 tables. Second edition. (New York : John Wiley & Sons ; London : Chapman & Hall, Ltd. Not dated. Price 11s. 6d.)
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14 March 2018, p. 150
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Mineralogical Magazine and Journal of the Mineralogical Society, Volume 18 - November 1916

Research Article

A butterfly-twin of Gypsum 1

Obituary

Obituaries

Front matter

MMA volume 18 issue 85 Cover and Front matter

Reviews

Mining Engineers' Handbook. Edited by Robert Peele. Pp. x+2375, illustrated. First edition. (New York : John Wiley & Sons, Inc.; London: Chapman & Hall, Ltd., 1918. Price 23s. net.)

Economic Geology. By Heinrich Ries. Pp. xviii + 856, with 75 plates and 291 text-figures. Fourth edition. (New York: John Wiley and Sons, Inc. ; London: Chapman & Hall, Ltd. 1916. Price $4.00 = 17s. net.)

The Banket. A study of the auriferous conglomerates of the Witwatersrand and the associated rocks. By Robert B. Young. Pp. xv+125, with 28 plates and 1 text-figure. (London: Gurney & Jackson. 1917. Price 8s. 6d. net.)

Introduction to the Rarer Elements. By Philip E. Browning. Pp. x + 250, with coloured plate of spectra. Fourth edition. (New York : John Wiley & Sons, Inc. ; London: Chapman & Hall, Ltd., 1917. Price 7s. net.)

A Study of the Magmatic Sulfid Ores. By C. F. Tolman and Austin F. Rogers. Pp. 76, with 20 plates and 7 text-figures. (Leland Stanford Junior University Publications, University Series. 1916. Price $1.00.)

The Magic of Jewels and Charms. By George Frederick Kunz. Pp. xv + 422, with 56 plates and 29 text-figures. (Philadelphia and London : J. B. Lippincott Co. 1915. Price $6.00 net.)

Practical Instructions in the search for, and in the determination of, the useful minerals, including the rare ores. By Alexander McLeod. Pp. xxvii + 254. Second edition. (New York : John Wiley & Sons, Inc. ; London : Chapman & Hall, Ltd., 1917. Price 8s. 6d. net.)

Other

Index to Vol. XVIII

Reviews

Os Satellites do Diamante. By Eugenio Hussak:. Pp. 56, with 3 maps (Rio de Janeiro: Serviço Geologico e Mineralogico do Brazil. 1917.)

Correction

Errata

Reviews

Bibliography of Yorkshire Geolopy. By T. Sheppard. Pp. xxxvi + 629. (London, Hull, and York : A. Brown & Sons, Ltd. 1915. Price 15s.)

Front matter

MMA volume 18 issue 87 Cover and Front matter

Reviews

Bibliography of Australian Mineralogy. By C. Anderson. Pp. 164. Mineral Resources, No. 22, Geological Survey, New South Wales. (Sydney, 1916. Price 2s. 6d.)

Microscopic Determination of Opaque Minerals, an aid to the study of ores. By Joseph Murdoch. Pp. vii+105, with 1 coloured plate and 9 text-figures. (New York: John Wiley & Sons, Inc.; London : Chapman & Hall, Ltd. 1916. Price 9s. 6d.)

A Pocket Handbook of Minerals designed for use in the field or class-room, with little reference to chemical tests. By G. Montangue Butler. Pp. ix+311, with 89 text-figures and 5 tables. Second edition. (New York : John Wiley & Sons ; London : Chapman & Hall, Ltd. Not dated. Price 11s. 6d.)

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Mineralogical Magazine and Journal of the Mineralogical Society, Volume 18 - November 1916

Research Article

Obituary

Front matter

Reviews

Other

Reviews

Correction

Reviews

Front matter

Reviews