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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. 1894 edition. Excerpt: ...one head by Hauy, although relationship of species in crystallization had been observed by the early crystallographer, Rome" de Lisle. The oxide of aluminum in its purest state is perfectly colorless and transparent; but it is seldom found in this condition; corundum is generally tainted by some oxide of metal. The purer kinds of fine colors, transparent and translucent and useful as gems, are known as sapphires; the dull colors, not transparent, are called corundum; while the black or grayish-black variety intimately mixed with oxide of iron, either magnetite or hematite, is distinguished as emery. SAPPHIRE. The variety termed "Sapphire" includes all those kinds of corundum, which, on account of their purity in color, transparency and translucency, may be used as gems. Under this head, therefore, are grouped many stones having individual names. For simplicity in classification, jewelers have adopted the following table. It will be observed in this table that shades of red are classified as "Rubies," while any other color, or those destitute of color, pass under the head of "Sapphire" --Jeweler's Classification Of Sapphire. red. Ruby. True Ruby or Oriental Ruby. Anthrax (Theophrastus) Carbunculus Lychnis (Pliny) Ruby shades of red. Oriental Amethyst purple. Sapphire. True Sapphire blue. Sapphire shades of blue. Sapphire, (Diamond Spar) )... (Adamas, Pliny) Oriental Topaz yellow. Oriental Emerald green. Star Sapphire... Asteria (Pliny). Ruby.--This is pre-eminently the most important of the "precious stones " of this species. Its marvelous beauty, which induced worship from the ancients, has ever awakened an allied feeling in the hearts of Christians. Stones of true "pigeon's blood..".

Excerpt from A Preliminary Report on the Coal Deposits of Georgia, 1904 The Carboniferous rocks of Georgia have been divided by Dr. C. W. Hayes, of the United States Geological Survey, into the following five divisions, named in the ascending order: Fort Payne Chert, Floyd Shale, Bangor Limestone, Lookout Sandstone and Walden's Ridge Sandstone.2 The three first divisions, here given, belong to the sub-carboniferous series; while the two remaining divisions constitute the Carboniferous formation proper, or the Coal Measures. 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.

Excerpt from Bulletin Georgia, 1918: A Preliminary Report on a Part of the Pryites Deposits of Georgia The productive capacity of the Georgia mines and concentrating plants has been increased greatly during the past year or two. In 1916 only two mines reported production. In 1917 five companies the Standard Pyrites Company, the Georgia Mining Company, the Shirley Mining Company, the Sulphur Mining Railroad Company. 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.

Excerpt from A Preliminary Report on a Part of the Gold Deposits of Georgia 14. On page 254, sth line from the bottom, for seven hundred penny weigh ts read several hundred pennyweights. 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.