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Great experience is required to accustom the ear to the correct intonation, as in general the tensile strain on the saws approximates so closely to the breaking point that one or two extra taps on the keys are quite sufficient to rupture them. Mr. Brunel, in the government saw-mills at Woolwich, adopted a method of hanging saws by means of a weighted lever, like a Roman steelyard.
This," he indicated the fragment of a grace razed over twenty-three hundred years before, "is good for nothing that I see." Now, Howat told himself, it was merely a question of tensile strength. His old enthusiasms, his passionate admiration for the operas of Christopher Gluck, the enthusiasms and admirations of his kind, were being pushed aside for things of more obvious practicality.
Ligaments are injured less frequently than are bones. Because of their flexibility they escape fracture in the manner that bones suffer. They are, however, completely severed by being cut or ruptured, though fibrillary fracture the result of constant or intermittent tensile strain is of more frequent occurrence.
The tensile strength of gun metal, such as is used in engines, is about 36,000 lbs. per square inch of section; of wrought copper about 33,000 lbs.; and of cast copper about 19,000 lbs. per square Inch of section. Q. Is the crushing strength of steel greater or less than its tensile strength? A. It is about twice greater.
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