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Show H OO DRAINS ARE jH DESTROYED. Drainage districts where there is flH alkali should not use cement tile. This ' is the decision aiTived at after eight B years of investigation carried on by H lie United States bureau of standards H and other government agencies. The best quality of drain tile has H been disintegrated during a period of 1 exposure of less than six years Where i he soil and water contain 0.1 per j B rent or more ol salts of the sulphate j H lype, cement drains should not be j H used without investigating the subsur-1 H lace alkali conditions H There are areas In Ut&h which have been drained by concrete tile and it would be interesting to learn tho effect ef-fect of the action of salts which are known to exlsi in nearly all the districts. dis-tricts. This is a most important discovery, as much ot the irrigated west even tually must be drained and it would be a source of great loss to the diaJnngc dietrictA to place a tile which, within a few years, would be destroyed |