Mineral Resources of Minas Geraes (Brazil) PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Mineral Resources of Minas Geraes (Brazil) PDF full book. Access full book title Mineral Resources of Minas Geraes (Brazil) by Albert Frederick Calvert. Download full books in PDF and EPUB format.
Author: Albert Frederick Calvert
Publisher:
ISBN:
Category : Gold mines and mining
Languages : en
Pages : 222
Get Book Here
Book Description
Author: Albert Frederick Calvert
Publisher:
ISBN:
Category : Gold mines and mining
Languages : en
Pages : 222
Get Book Here
Book Description
Author: Albert Frederick Calvert
Publisher:
ISBN: 9781332591060
Category : Science
Languages : en
Pages : 222
Get Book Here
Book Description
Excerpt from Mineral Resources of Minas Geraes (Brazil) Every writer who has made a study of the mineral resources of Brazil has been struck by the amazing anomaly that proportionately as the incalculable extent and richness of those resources has become better known, the mining industry of the country has diminished. Many reasons have been advanced to explain the enigma that the facts present. The liberation of the slave-workers, bad legislation and exorbitant taxation, lack of railway communication, political unrest and financial instability, and the incompetence and dishonesty that have attended the exploitation of the mines and the management of the companies that have been formed to work them, are among the numerous disabilities from which the industry has suffered in the past; but while these drawbacks are being steadily removed, the disfavour, into which mining enterprise in the Republic has fallen, remains. The Brazilians themselves, apparently indifferent to the enormous national asset which these minerals represent, have devoted their activities to agricultural advancement, and it would almost seem that these people, with a score of potential gold-fields at their very doors, are immune from that "gold fever" which has rendered possible the recent stupendous progress that has been made by a host of other countries less rich in minerals than their own. The diamond industry of Brazil is a dwindling enterprise in the hands of individual prospectors and ill-equipped bands of miners, although for a century and a half which succeeded the discovery of the first brilliant in Diamantina, Brazil's output of diamonds exceeded that of any other country. 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: Roberts Manning Wallace
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 76
Get Book Here
Book Description
Author: Charles Henry Maxwell
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 88
Get Book Here
Book Description
Author: Albert Frederick Calvert
Publisher: Legare Street Press
ISBN: 9781016656351
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Albert Frederick Calvert
Publisher: Theclassics.Us
ISBN: 9781230370361
Category :
Languages : en
Pages : 32
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. 1915 edition. Excerpt: ... came into the capital of the State with over 300 fine stones found in the Rio Graca, a tributary of the Araguaya. In Matto Grosso, the principal seat of the diamond mining is the River Coxipo Mirim. The depth of the cascalho varies, but the maximum is about 14 ft., and is comprised of jaspers, amethysts and chalcedonies, rose zircons, anatase, almandine garnets, white topazes, sphenes, native silver, &c. The diamonds are small, the largest found being 5 carats. The form is usually dodecahedron with well curved faces. The surrounding formation is schists and quartzites. No carbonates or boart is found. FAMOUS BRAZILIAN DIAMONDS. Two diamonds produced by Brazil have become historic under the names of the Estrella do Sul and the Diamond of Dresden, both of which are now owned by an Indian prince. Both were found in the alluvial workings of the River Bagagem. The Estrella do Sul, discovered in 1853, weighed in the rough 255 carats and 125 carats cut, and the Dresden Diamond weighed carats uncut and 63J carats cut. In 1910 a third gem was discovered, weighing 175 carats, which has been named the Estrella de Minas. Dr. Derby, writing in the American Journal of Science (September, 1910), advances the theory that these three diamonds were of the same original form, i.e., that of a combination of curved faces, constituting a dome rising from a plane surface. The River Abaete produced a stone of 161J carats in 1797, and another, later, of 48 carats. In 1906 a stone of some 600 carats was encountered in the River Verissimo, in Southern Goyaz, not very far from Bagagem, but was destroyed by being tested on an anvil with a sledgehammer. A splendid brilliant, dating from colonial times, near to ruby red in colour, and weighing 2f carats. sold in...
Author: P.C. Keller
Publisher: Springer Science & Business Media
ISBN: 1468466747
Category : Science
Languages : en
Pages : 315
Get Book Here
Book Description
Each gem deposit-whether of primary origin in the parent rocks; or secondary as alluvial placers in valley floors, river gravels, or the sand of oceanic shelves presents an eloquent chronicle of the Earth's life story. It reveals to the expert the prodigious processes which formed the present crust of our planet, of which this volume discloses a small but exciting detail. The materials of the Earth's crust are the rocks. In this book, the author expounds on how they were formed, why they altered, why they became the cradles of precious gemstones, how they are categorized, and how they are now exploited by man. What initiates the growth of gemstones? How do they crystallize? Why do gemstones of the same species, originating from different sources, vary? What causes the occurrence of varieties? Why do diamonds, unlike other precious stones, occur not near the Earth's surface in its crust, but deep down beneath it in the upper mantle? These are only a few of the entrancing subjects discussed in this enlightening volume. The reader learns that the Earth is surprisingly alive and altering constantly-sometimes through slow and equable changes and at times by violent and tremendous cataclysms, events from which gemstones issue.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 592
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Engineering
Languages : en
Pages : 1560
Get Book Here
Book Description
Author: John Van Nostrand Dorr
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 120
Get Book Here
Book Description
