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Show ENGLAND WAKES UP TO USE CONCRETE LONDON, April 18.--"The twentieth century will .be known In epochs to come as khe Concrete Age. following the Stone. Bronze, Iron and Steel ages." Thus prophesies Trol. Winn of the Rbal engineers In a magazine article. The discovery fifty years ago of chalk-and-clay cement, from which sprang the Portland Port-land cement Industry, has led to a revolutions revolu-tions engineering, which has made possible pos-sible many colossal works which could not have been carried out before. It is curious that tho Inventor of modern concrete con-crete was also a British engineer officer. Sill Charles Pnsley. A kind of concrete called rubble was largely used In the construe! Ion of ma-dln-val castles nnd proved an ideal material ma-terial for defensive works until the Introduction In-troduction of modern artillery. In railway engineering concrete la nnw employid for kw.tlge work, though Its Introduction In-troduction was slow, owln? to thj fear that heavy traffic would 'result in rapid crumbling of the material. America is lar lu advance of England la making use of concrete, ono firm alone producing 10,000,000 barrels of cenient a year. Two magazines :evoted Id con-crate con-crate are publl-ihcd in this country. Entire En-tire houses, barns, silos and a scor of other kinds of fcullillnss are constructed of the material, and railways are abr.n-doBlng abr.n-doBlng steel bridges and oui:dln3 new ones of concrete. . i . . |