Word: high
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Dates: during 1950-1959
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Canada's Bureau of Statistics last week reported employment at an alltime high, with 6,053,000 at work and unemployment running lower than Ottawa economists dared expect only a few months ago. The number of jobless Canadians dropped sharply last month to 234,000, which is 3.7% of the labor force, compared with 10% in March 1958. As the result of stronger demand for Canadian raw materials in the bullish U.S. recovery, Canadian exports to the U.S. surged to $321.1 million in June (v. $233.6 million in June 1958), and overall exports were up to a one-month...
...there is a third world war," the U.S.'s late great General Henry H. ("Hap") Arnold once observed, "its strategic center will be the North Pole." Last week, as the brief northern summer edged into Canada's high Arctic, Canada and the U.S. were busy pushing their strategic frontiers closer to the North Pole. At Churchill and Frobisher Bay, three hours' jet flight from the Pole, growling bulldozers lengthened runways to accommodate the Strategic Air Command's jet tankers. At remote island outposts, stevedoring crews labored through the pale summer nights to put ashore the year...
...Arctic as the land north of the tree line-roughly the climatic boundary where the July temperature averages no more than 50°. But the January mean in Whitehorse is 8° warmer than Winnipeg's, 750 miles to the south; Fort Smith's all-time high of 103° is 1° higher than New Orleans'. The annual snowfall at Resolute (latitude 75° N.) is less than Boston's. The summers are brief but bright, and on the North's few tilled acres, the warming sun, shining 20 hours a day, produces dahlias...
Acoustica engineers explain that when a solid fuel burns in a high-pressure combustion chamber, the components, e.g., ammonium perchlorate and polystyrene, turn to gases that mix in a thin layer on its surface. Part of the heat generated strikes back to the fuel, gasifies more of it, and so keeps the flame burning. When this characteristic was discovered by Dr. Martin Summerfield of Princeton, the next step was to look for something that would control the gas mixture. A faster mixing would increase the burning rate, while slower mixing would decrease it. If the control were precise enough, scientists...
Acoustica's idea is to control the fuel by blowing high-pressure gas through a heat-resistant whistle at the forward end of the cylinder's cavity. While the cavity is still small, the whistle will screech at full power, increasing the burning rate of the fuel. As the cavity grows bigger, a valve will reduce the amount of gas passing through the whistle. The volume of sound will decrease, and so will the fuel's burning rate. If the valve is manipulated efficiently by some pressure-sensing instrument, it will keep the hot gas inside...