Danmarks Handel og Industri

86 Flintesten. — Flint Pebbles. — Galets silex. — Flintsteine. Flint occurs to a large extent in the Danish chalk formation, but owing to its small value for industrial purposes it can only be utilized to advantage where the chalk formation extends to the sea shore, and the flint, con- sequently, can be gained by the natural precipitation caused by the washing operation of the sea. Flint is either the so-called black flint or flint pebbles. The former is used as a raw material in the ceramic industry, but repre- sents in this respect only a small commercial value. Considerably greater value is present in the flint pebbles formed of the masses of flint washed down on to the sea shore, which for centuries have been subjected to a rolling and tearing movement caused by the beating of the waves, by which part of the flint has assumed a more or less spherical shape. On account of their hardness these flint pebbles, which are picked up on the coast, are usable as grinding bodies for grinding more or less hard materials, such as limestone, cement etc. The pebbles are used to a large extent in the so-called tube mills, which have been developed in the Danish industry, and are in use now everywhere in the grinding industry. The advantage of the Danish flint pebbles consists especially in their extraordinary hardness, in which respect flint from Denmark offers considerable advantages as compared with the flint pebbles produced in other countries of Europe or in America. Dansk Stenkompagni, Ltd., Frihavnen. Copenhagen. Scheitel & Co., Dansk Flinteksport, Ltd. (T.»Flinteksport«), 26 Amaliegade. — F. L. Smidth & Co. (T. »Folasmidth«), 33 Vestergade. — P. Seht & Co. (T. »Soht«), 22 Holmens Kanai. — Kridt og Kalk. — Limestone and Chalk. — Craie et calcaire. — Kreide und Kalk. Limestone and chalk are found in many places in Denmark where they are also quarried. From a geological point of view very old dark- coloured chalk stones (from the paleozoic age), as a rule containing clay are found in the southern part of the island of Bornholm. From the early Middle Ages they have been quarried and employed as building stone. T. signifies Telegraphic address.