Word: seismographs
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Dates: during 1930-1939
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...Dictator Franco turned down their offer to bank him last spring. After Adolf Hitler came to power, Amsterdam became a concentration camp for refugee money. The city's grain market is one of the biggest in Europe; its stock-market is a sensitive, if not completely reliable, seismograph of world conditions...
Contrary to the reports in Boston papers, Ottawa was the center of yesterday's earthquake instead of the middle of the ocean, Dr. L. Don Leet, head of the Harvard seismograph station reported last night. Previously Dr. Leet had hazarded the guess that the center of the quake was in the ocean, but recent reports from other stations confirmed the fact that the worst tremors were somewhere in the vicinity of Ottawa...
Discovery of a new type of underground earthquake wave, vitally affecting seismological theories and problems of building reinforcement, was reported today by Dr. L. Don Leet, Director of the University Seismograph Stations...
Because of its importance in tremors arising from explosions, the new wave is expected to play a considerable part in proposed uses of the seismograph in army artillery observation, for the location of heavy enemy guns, and also for computation by a gun crew of their accuracy of fire. Both the discharge of a cannon and the explosion of a shell set up vibrations underground which can be traced by earthquake instruments...
...years later, the possibility of Cuba's harboring a great oil reservoir is again under investigation. Geologists are examining cores from thousands of feet below the surface; radio seismograph crews are sounding in Cuba's hills. Designed to bolster the island's limited revenues, the new petroleum law passed by the legislature all but forces activity on concessions by requiring each concessionaire to drill within five years at least one well to 4,000 feet unless oil is struck at lesser depth; the alternative to such exploitation is Government confiscation...