$1.00 A YEAR. WICE.1'. THE NEW CHICAGO WATER WORKS—THE LAKE TUNNEL INTAKES AND CAISSONS. Chicago has long been noted for its Water works drawing their supply from the inexhaustible reservoir of Lake Michigan. They have been termed one of the lake in order to secure a pure supply. On December rished to the city through it on March 25 1867. The original tunnel was in brick 62 inches high and 60 inches wide lying from 66 to '70 feet below the surface of the water. As Chicago lies nearly on a plain all city levels are referred to this point tbe surface of the lake. It forms a plane of reference and is termed the city datum. At the end of the tunnel a grated cylinder of iron was established through which the water enters the tunnel. This intake for further protection was surrounded by a crib and breakwater. Subsequently a second tunnel 84 inches in diameter carried out to the same crib was extended under the city so as to give an independent supply to the southwestern quarter. The original pumping engines had a daily capacity of 72.000000 gallons. The original tunnel could deli ver 57000000 gallons in the same time. In addition to the lake supply of water a number of artesian wells have been sunk; at depths varying from 650 to nearly 2000 feet. The water from these wells is not of the THE NEW CHICAGO WATER WORKS—THE LAKE TUNNEL. INTAKES. AND CAISSONS., scientific american, 1889-12-14
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$1.00, YEAR, WICE.1', NEW CHICAGO WATER WORKS— LAKE TUNNEL INTAKES, CAISSONS, Chicago, long, noted, Water works drawing, supply, inexhaustible reservoir, Lake Michigan, termed, lake, order, secure, pure supply, December rished, city, March 25 1867, original tunnel, brick 62 inches high, 60 inches wide lying, 66, '70 feet, surface, water, Chicago lies nearly, plain, city levels, referred, point tbe surface, lake, forms, plane, reference, termed, city datum, tunnel, grated cylinder, iron, established, water enters, tunnel, intake, further protection, surrounded, crib, breakwater, Subsequently, second tunnel 84 inches, diameter carried out, crib, extended under, city, give, independent supply, southwestern quarter, original pumping engines, daily capacity, 72.000000 gallons, original tunnel, deli ver 57000000 gallons, time, addition, lake supply, water, number, artesian wells, sunk, depths varying, 650, nearly 2000 feet, water, wells, NEW CHICAGO WATER WORKS— LAKE TUNNEL, INTAKES, CAISSONS, scientific american, 1889-12-14, science, scientific, sciences, mind, health, tech, sustainability, publication, lab, sciam, sa, scientist, research, american, experiment, education, discovery, technology, analysis, magazine, u.s., insights, developments, weekly, broadsheet, inventor, innovation, inventions, patented, industrial revolution, emerging, trends, monthly magazine, united states, engravings, curious works, paper, discover, Scientific Paper, Weekly Journal, Practical Information, Art, Science, Mechanics, Chemistry, Manufactures, research, education, scientist, innovation, 19th century, vintage, america, Rufus M. Porter, 1845, journal, academic, newspaper illustrations, retro style, old-fashioned, media illustrations, victorian style, news, newspaperheadline, 19th century style, illustration, journalism
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