Word: ink
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With a license from the Atomic Energy Commission, a radiologist named Harris Levine began some dangerous tinkering at his New Jersey home. Using the radioactive isotope americium 241, he devised a technique for spotting counterfeit money. The trick was to contaminate the engraver's ink with a trace of a radiation-free isotope, boron 10, activate it with americium and then pick out the bills that did not properly respond to detectors...
...picture took six weeks to complete, from the first ink drawing on a gesso-covered wood panel to the final delicate strokes of ocher tempera. The result is a memorable portrait of a girl with a look-wary, contained, but challenging-that speaks of the courage and the ordeal of those who, in Frost's phrase, have taken the road "less traveled...
...household was how to obtain writing paper, domestic help and food-fish, oysters and Hungarian wines were his special favorites-as cheaply as possible. That was important, since Beethoven was one of the greatest penny pinchers who ever lived. He was delighted to receive a fountain pen that held ink for five days, to hear about a new fragrance for men that supposedly was better than eau de cologne. In his last years, he made a brief effort to master one of the few arts he had never learned as a child -multiplication...
...drawn in delicate ink...
...weight grew by 15 tons from its projected 340 tons, and Pratt & Whitney had to rush development of a still more powerful engine. Because it burns its fuel more efficiently than other engines, the 747 is virtually free of the greasy smoke that trails ordinary jets on takeoff like ink from a frightened squid. Its engine is only half as loud as a 707's, though the difference will be less noticeable during takeoffs than landings. The new engine was not put into production as fast as the plane. Boeing last week had 15 expensive airframes sitting powerless outside...