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A Hair in Iron

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Seventh-day Adventist Missionary Society · Oakland, Cal. · Aug 9, 1883

FromSigns of the Times, Vol. 9, No. 30.

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A Hair in Iron

THE Mechanical Engineer reports a curious effect produced on a wrought-iron forging by a human hair. The forging was in a cold-press—that is, a powerful press for finishing the forging after it is shaped. During this process it is put between two hardened steel dies and subjected to a pressure of 200 tons to the square inch. At one of these operations a hair taken from the head of a by-stander was placed on the head of the forging, and the full pressure applied. The result was that the hair was driven into the forging and imbedded in it. The hair itself was uninjured during the operation, and was removed intact.