Our mineral reserves

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Monograph

Identifikator:: 1013879643

URN:: urn:nbn:de:zbw-retromon-23338

Document type:: Monograph

Author:: Bucharin, Nikolaj Ivanovič http://d-nb.info/gnd/118516574

Title:: Oekonomik der Transformationsperiode

Place of publication:: Hamburg

Publisher:: Verlag der Kommunistischen Internationale

Year of publication:: 1922

Scope:: 1 Online-Ressource (199 Seiten)

Digitisation:: 2018

Collection:: Economics Books

Usage license:: Get license information via the feedback formular.

Chapter

Document type:: Monograph

Structure type:: Chapter

Title:: 7. Kapitel. Allgemeine Organisationsformen der Transformationsperiode

Collection:: Economics Books

38 OUR MINERAL RESERVES. should be adaptable for crucible making. Although the deposit does not compare in size with the Ceylon deposits, it might render mate rial aid in case of a shortage. The graphite deposits of the United States are fully described in a report by Edson S. Bastin on the production of graphite in 1913, recently issued by this Survey. FLINT. In 1913 nearly $320,000 worth of flint pebbles was imported into the United States, mainly from Denmark and France. In these countries the flint occurs as irregular nodules in the chalk cliffs that border certain parts of the coast, and under the impact of the waves the hard flint nodules become freed from their relatively soft chalk matrix and are gathered in great quantities from the beaches for shipment to various parts of the world. After reaching their desti nation the more irregular nodules are calcined and ground to a fine powder for use in pottery manufacture, but those that have been well rounded by the waves are reserved for use in tube mills, their hard ness and chemical inertness making them a desirable grinding agent. The cutting off of the imports of flint pebbles should work no material hardship to the pottery industry, as that industry uses only subordinate amounts of flint compared with the crystalline quartz obtained in Connecticut, New York, and Maryland, and as the supply of the quartz is far in excess of the present demands. A cutting off of the supply of rounded flint pebbles suitable for tube-mill use would probably entail some inconvenience, for so far as is known we have no flint deposits that are comparable in both quality and quan tity of material with the foreign supplies or that could compete with them (except perhaps locally) under ordinary conditions of uninterrupted foreign commerce. On account of the high quality of the foreign flints and the cheap ness with which they can be brought into this country, little attempt has been made either by the Survey geologists or by dealers in flint to investigate the domestic sources. Deposits of flint pebbles have been observed at several localities in this country in the course of the geologic surveys, but they have seldom been examined with especial view to the possible utilization of the flints in tube mills. The information available is therefore fragmentary and may, at the most, serve only as a guide to further prospecting and testing. The principal localities at which flint pebbles have been noted in particular abundance are all in the Gulf States. The pebbles occur mainly in gravel beds, and only part of them are well rounded. In some places the gravels are stained and partly cemented by oxides of iron, but elsewhere they appear to be fairly free from iron.

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