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Clarence Madison Dally (January 8, [1] 1865 – October 2, 1904 [2]) was an American glassblower, noted as an assistant to Thomas Edison in his work on X-rays and as an early victim of radiation dermatitis and its complications. He is thought to be the first human death resulting from X-ray exposure.
Edison began studying X-rays almost immediately after Röntgen's discovery and delegated the task to Dally. Over time, Dally underwent more than 100 skin operations due to radiation damage. Eventually, both of his arms had to be amputated. His death led Edison to abandon all further X-ray research in 1904.
Edison in 1861. Thomas Edison was born in 1847 in Milan, Ohio, but grew up in Port Huron, Michigan, after the family moved there in 1854. [8] He was the seventh and last child of Samuel Ogden Edison Jr. (1804–1896, born in Marshalltown, Nova Scotia) and Nancy Matthews Elliott (1810–1871, born in Chenango County, New York).
He X-rayed his wife's hand, capturing her bones and wedding ring to show colleagues. Thomas Edison and assistant Clarence Dally recreated the machine. Dally failed to test another X-ray machine at the 1901 World's Fair after President McKinley was assassinated. [26] A perfected X-ray machine was successfully exhibited at the 1904 World's Fair.
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Thomas Edison discovers thermionic emission. This effect forms the basis for the vacuum tube and the cathode ray tube. approximately 1893: The selenium phototube invention allows the conversion of brightness values into electrical signals. The principle is applied in wirephoto and television technology for a short time.
NRL is one of the first US government scientific R&D laboratories, having opened in 1923 at the instigation of Thomas Edison, and is currently under the Office of Naval Research. [ 2 ] As of 2016, NRL was a Navy Working Capital Fund activity, which means it is not a line-item in the US Federal Budget.
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