Word: newe
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Dates: during 1960-1969
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...boyhood home had tremendous elms," recalls John Hansel, 45, a New Jersey manufacturer of watercoolers. "Those trees were my symbols of the past." In fact, Hansel bought his present house in Riverside, Conn., mainly because four venerable elms shaded the front yard. Unfortunately, two of the trees soon died, victims of the Dutch elm disease that now kills about 1,000,000 trees a year in the U.S. Distraught, Hansel launched a personal crusade to save the threatened species. In 1965, unimpressed by the botanists who believed that the American elm was doomed, Hansel set up Elms Unlimited, which...
Hardy Siberians. Now there is new hope for elm lovers. Funded with a $30,000 grant from Hansel's institute, Entomologist Dale Norris of the University of Wisconsin recently discovered a subtle chemical reaction that occurs when beetles attack elms. It is the quinol compounds in elm bark, he found, that make the tree delectable to beetles. Paradoxically, when the insects begin to munch, oxidation changes the tasty quinols into quinones that repel the beetles. By this time, unfortunately, the beetles have already infected the tree with deadly fungus. To ward off the beetles, Norris is now working...
...parallel attack on elm disease, the U.S. Department of Agriculture intends to cross the disease-prone American elm with the hardy Siberian variety. Even if the hybrid is a success, elm lovers are not likely to be pleased. The new tree clearly lacks the grace of its American parent. "It has a single, central trunk rather than our beautiful vaselike division," says Hansel. "Who will want a tree that looks more like a maple than...
...string. Even children who never had seen pendulums before tried each possibility until they found that only shortening or lengthening the string did the trick. Quite possibly, Piagetians sometimes speculate, adolescents' fascination with their ability to visualize alternatives is what makes them so eager to test new life-styles and Utopian ideals...
...production of classroom hens. As Piaget said recently, "a ready-made truth is only half a truth. The goal of education is not to increase the amount of knowledge but to create possibilities for a child to invent and discover, to create men who are capable of doing new things...