Dictionary Of The Worlds Commercial Products With French German And Spanish Equivalents For The Names Of The Commercial Products

Author : John Arthur Slater
Publisher : Rarebooksclub.com
ISBN 13 : 9781230034799
Total Pages : 118 pages
Book Rating : 4.0/5 (347 download)

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Download or read book Dictionary of the World's Commercial Products; with French, German and Spanish Equivalents for the Names of the Commercial Products written by John Arthur Slater and published by Rarebooksclub.com. This book was released on 2013-09 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. 1922 edition. Excerpt: ...iron. One of the most familiar of all iron ores, but of no service for the extraction of the metal itself, is the sulphur ore, or iron pyrites. The beautiful and highly lustrous crystals of this mineral are likely to occur in almost any kind of rock. The crystals are cubes or modifications of the cube, of a brass-yellow colour, and usually so hard as completely to resist the impression of a knife. This fact should readily distinguish it from gold, with which it is frequently confounded by over-zealous searchers after the precious metal. Its greater hardness and lighter colour also serve to distinguish it from copper pyrites, another form of which is known as fool's gold. Almost the only service to which pyrites are put to-day in the arts is the making of sulphur and sulphuric acid. Another sulphur ore of iron is known as pyrrhotite, or magnetic pyrites. Its reddish or bronze colour readily serves to distinguish it from ordinary pyrites, and its frequent association with nickel makes it one of the most valuable ores of that metal. Iron is obtained from its ores by smelting with coal or coke in blast furnaces. The exact process followed depends to a large extent upon the nature of the ore. The various kinds of iron are named castiron, steel, and wrought iron, depending upon the amount of carbon contained in it. When pure, iron is white. It is a most tenacious metal and very difficult of fusion. Its specific gravity is 7 8. It is strongly magnetic, but some of its magnetism is lost when the metal is heated. Though iron does not oxidise at ordinary temperatures, it is quickly covered with a black coat when heated to redness, and rust is produced when dampness is present. The uses to which iron is put in various manufactures are too numerous...