Author: Edward Salisbury Dana
Publisher:
ISBN:
Category : Mineralogy
Languages : en
Pages : 96

Get Book Here

Book Description

Author: Edward Salisbury Dana
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

Get Book Here

Book Description

Author: Edward S. Dana
Publisher:
ISBN:
Category :
Languages : en
Pages :

Get Book Here

Book Description

Author: Edward Salisbury Dana
Publisher:
ISBN:
Category : Crystallography
Languages : en
Pages : 324

Get Book Here

Book Description

Author: Edward Salisbury Dana
Publisher:
ISBN:
Category : Mineralogy
Languages : en
Pages :

Get Book Here

Book Description

Author: James Dwight DANA
Publisher:
ISBN:
Category :
Languages : en
Pages : 75

Get Book Here

Book Description

Author: Edward S. Dana
Publisher: Forgotten Books
ISBN: 9781333495831
Category : Science
Languages : en
Pages : 134

Get Book Here

Book Description
Excerpt from Second Appendix to the Sixth Edition of Dana's System of Mineralogy This Second Appendix to the Sixth Edition of the System of Mineralogy issued in 1892 is designed to make the work complete up to the beginning of 1909. Its preparation was begun by the Senior Editor soon after the publication of the First Appendix in 1899, and carried forward at 'intervals down to 1900, when he was finally compelled to relinquish it. The work was resumed by the Junior Editor in 1907 and carried through to completion. During the ten years Of mineralogical investigation which this appendix covers, a large amount of material has been published. An evidence of this is to be found in the two hundred new names which are given in the classified list in the Introduction. About sixty of these new names on account of the completeness of their descriptions seem to have a warrant for their acceptance as new Species. The other names are either of imperfectly described minerals or variety names of well-recognized species. The descriptions of the new species included in this book are given concisely but completely. It was found, however, impracticable to follow the plan adopted in the System and the First Appendix of recalculating all the angles and crystal constants of the new species. This has been done in a few cases, but in the majority of the descriptions the figures of the authors have been accepted without verification. In the cases of some of the new species with complex crystals it has been impossible to give the complete lists of the forms identified upon them. The method followed has been to give the more common and prominent forms and to indicate the number of those not listed. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Author:
Publisher:
ISBN:
Category : Mineralogy
Languages : en
Pages : 75

Get Book Here

Book Description

Author: William Ebenezer Ford
Publisher:
ISBN:
Category : Mineralogy
Languages : en
Pages : 116

Get Book Here

Book Description

Author: Edward Salisbury Dana
Publisher: Rarebooksclub.com
ISBN: 9781230191195
Category :
Languages : en
Pages : 52

Get Book Here

Book Description
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 edition. Excerpt: ...of pulverulent silica. Occurs at Kfitz, near Rakonitz, Bohemia, at the formerly worked antimony mines. Named after Professor H. Hoefer of Leoben. Hopeite, p. 808.--Crystals described from Moresnet, Belgium, G. Cesaro, Mem. Acad. Belg., 63, 1897. Humite Group, p. 535.--Analyses on carefully selected material, identified by crystallographic study, have enabled Penfleld and Howe (Am. J. Sc., 47, 188, 1894) to establish the following formulas for the three species of the group: These formulas vary progressively by an increase of one molecule of (Mg, SiO4), and this variation is closely connected with the crystallization (see Miti., p. 534). The vertical axes are in the ratio of 5: 7: 0, that is, of the total number of magnesium atoms present. The same result was reached at nearly the same time by Hj. Sjogren, Bull. G. Inst. Upsala, 2, 39-54, 1894. Penrield and Howe also remarked that another member of the series, having the composition MgMg(P, OH)Si04, was to be expected, whose axial ratio should be about 1 086:1:1 887, 0 = 90. This would then give for the vertical axes of the four compounds the ratio of 3: 5: 7: 9. A member of the group having this form was later discovered by Hj. Sjogren and called Proleetite. Though not yet analyzed, its composition is probably expressed by the formula given above. See Proleetite. Cf. also Lewis, Min. Mag., 11, 137, 1896. A full study of the form and optical characters of crystals of the three members of the group, humite, chondrodite, clinobumite, has been also given by Sjogren, G. For. FOrh., 14, 423, 1892; Bull. G. Inst. Upsala, 1, 16-40, 1892. A humite, occurring in serpentine in the Allalln region, Valais, Switzerland, contains no fluorine, having the composition Mg, (MgOH), (SiO4)i, see analyses by