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Updated: June 20, 2025
It is a simple illustration of the readiness of seeming solids to vibrate with almost infinite swiftness. I have been to-day in what is to me a kind of heaven below the workshop of my much-loved friend, John A. Brashear, in Allegheny, Pa. He easily makes and measures things to one four-hundred-thousandth of an inch of accuracy.
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