Word: boulder
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Dates: during 1940-1949
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...perfect 20. Then they took a face from one photograph, a sky or a piece of building from another, joined them together like pieces of a mosaic, and enlarged the results until they were several times life size. The photographs came from U.S. scenes as far apart as Boulder Dam and Vermont. The battleship at the top came from the picture files of LIFE; airplanes came from the Paramount picture I Wanted Wings. The California farm worker at left glances back at a caterpillar tractor from Washington which has just passed over a Montana wheat field nestling at the foot...
...them contain the mineral in the wrong form for easy separation: manganese dioxide. But two new processes developed by the U.S. Bureau of Mines are on the point of making low-grade manganese oxide ore a useful citizen of steel metallurgy. Last week in three new pilot plants at Boulder City, Nev., where oxide ore beds adjoin Boulder Dam's cheap electricity, manganese's first citizenship papers were being signed...
...additional process, now being perfected at Boulder City, is electrolysis. The oxide is put in water with a solvent and a current is passed through the solution. The metallic part of the dissolved compound becomes a positive ion which migrates to and accumulates on the negative electrode...
...after Calvin Coolidge signed the bill authorizing Boulder Dam in 1928, eleven coastal cities (later 13) set up the Metropolitan Water District of Southern California. They voted a $220,000,000 bond issue, and in 1932 got RFC to help them sell the bonds. With a PWA loan, they started work on the aqueduct, which runs from Parker Dam, 155 miles south of Boulder Dam, to Lake Mathews, near Riverside. With the world's deepest dam foundation (233 feet under the river bed), Parker Dam stores water for the whole District system...
What made the East's dry weather most irritating to farmers was that on the other side of the Mississippi, from Kansas to the Pacific, rainfall had averaged anywhere from 11% to 133% above normal. There had been floods in California, Arizona, New Mexico. In Lake Mead, above Boulder Dam, was stored enough water to provide every inhabitant of the U.S. with 67,000 gallons, supply New York City for nearly 27 years...