Festschrift zur Feier des 250jährigen Bestehens der Freien Baugewerks-Innung Bauhütte zu Stade

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Monograph

Identifikator:: 897040368

URN:: urn:nbn:de:zbw-retromon-15215

Document type:: Monograph

Title:: Festschrift zur Feier des 250jährigen Bestehens der Freien Baugewerks-Innung Bauhütte zu Stade

Place of publication:: Stade

Publisher:: Selbstverlag der Freien Baugewerks-Innung

Year of publication:: 1913

Scope:: 1 Online-Ressource (110 Seiten, 24Blatt)

Digitisation:: 2017

Collection:: Economics Books

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Document type:: Monograph

Structure type:: Contents

Collection:: Economics Books

16 OUR MINERAL RESERVES. strong demand for manganese ore. For instance, during the last JO years the annual domestic production of manganese ore has ranged between 1,500 and 7,000 long tons, while the imports ranged between 108,000 and 345,000 long tons. In 1913 the domestic production of 4,048 tons, the largest since 1908, was insignificant compared with the imports of 345,090 tons, and constituted only a little over 1 per cent of the available supply. Another illustration of the great dis parity between the domestic production of manganese ore and the imports may be noted in the fact that the total production of the United States so far as recorded, going back to 1838, is 414,738 long tons—an amount not greatly in excess of the importations during the single year 1913. The imports of manganese ore recorded since 1868 have reached the grand total of 3,859,616 long tons, and the records are incomplete for the first 20 years of this period. The foreign situation as viewed by D. F. Ilewett early in 1914, in the chapter of Mineral Resources for 1913 on manganese and manga - ni ferons ore, is as follows: Imports of manganese ore increased approximately 15 per cent from 1912 to 1913, and this increase came alniost wholly from Russia. Unless industrial or political disturbances interfere, there is no doubt that a supply of ores will be available from the deposits of Russia, India, and Brazil for some years to come. As the disturbances that have arisen will undoubtedly interfere to a greater or less extent with the shipment of foreign manganese ores, it is cheering to know that the United States possesses within easy reach of manufacturing centers abundant reserves of such ores. The following notes on the domestic sources of manganese may be of interest in the present connection : For commercial purposes materials containing manganese are sep arated into four classes—(1) manganese ores, (2) manganiferons iron ores, (3) manganiferous silver ores, and (4) manganiferous zinc residuum. Though manganese forms a part of about a hundred minerals and is a relatively widespread element, practically all the manganese of commerce is derived from material containing one or more of the minerals polianite, pyrolusite, psilomelane, wad, man- ganite, brarinite, and franklinite. Commercial manganese ores are those which contain at least 35 per cent of manganese and otherwise conform to the specifications of the trade in which they are used. Deposits of manganese ore occur in many parts of the United States, but are most abundant in the Applachian and Piedmont regions, in the southern Mississippi Valley, and on the Pacific coast. Small deposits occur in the New England, Rocky Mountain, and Great Basin regions. The principal producing districts up to the present time have been the James River-Staunton River and Blue Ridge regions of Virginia, the Cave Springs and Cartersville districts in Georgia, the Batesville district

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