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We herewith present to our readers a view of a portion of one of the most remarkable works in hydraulic engineering of modern timal. . It is called the “ Canal de Isabella II.,” and was originally designed to supply the city of Madrid with water. It has, however,also been employed for inrigating the vegetable gardens in the environs jg.f the, Spanish capital. Thiseanal and the magnificent works connected' with it were sanctioned by the “ Spanish Government in 1851, and the work was broughtto completion in 1858. Its cost was 57,897,368 francs, over eleven and one half . millions of dollars in designed thig im- DonlEiucio del Yal- 113, engineer-in-chief to the Spanish Government. For his services he received the honor of the order ofCharles the Third. He was assisted by the present engineer of the works, Don Jose de Morer. The total length of the canal is over forty-seven miles. In this length there are seven miles of subterranean gal- leries,four thousand six hundred feet of aqueducts,andeight thousand six hundred feet of siphons. There are also many remarkable trenches, retaining walls, etc., and excepting the aqueducts, the entire canal is archedover. The water is brought from the river Lozoya, where it emerges from the Guadarama Mountains to the north of Madrid. A dam, ninety-eight feet in hight, is erected at this point, abutting on the rocka which form the banks ot the river. This is built of ,cut stone, and the lake formed by it contains one hundred millions cubic feet of water. The two principal siphons are those of Guadali)): aIl-d <1oa$1, The latter is the subject of the engraving which ac.
