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A comparison was made of fiber tensile values obtained on the Scott IP-4 machine and the Pressley Tester at their normal test speeds and also at comparable test speeds. The effect of elapsed time to break on the strength of fibrous materials was shown to be very great at the test speeds normally used on the Pressley Tester as compared to those on the Scott IP-4 machine.
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J.K. Phillips (1949) studied this question.
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