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William Herbert Rollins : ウィキペディア英語版 | William Herbert Rollins
William Herbert Rollins is a forgotten American scientist and dentist. He was a pioneer in radiation protection. Many of his inventions and investigations in medical radiography and photography have been ranked in importance with those of Thomas A. Edison, Elihu Thomson, and William J. Morton. He was a pioneer of radiation protection. ==Work== Rollins, although a practicing dentist, also had a medical degree from Harvard Medical School. He spent a great deal of his spare time, after the day's work, studying the recently discovered x-rays. Rollins had an intuitive respect for these powerful penetrating rays. He referred to them as X-light. William studied dentistry as an apprentice to Dr. Kidder of Lawrence, for three years. He then entered Harvard University School of Dentistry, graduating with the degree of D.M.D. in 1873, at the age of 21 years. A member of the faculty referred to Rollins as "one of the brightest men who has ever been graduated from the Dental School at Harvard." It was in his workshop where Rollins developed a number of pioneering instruments for dentistry an improved on others already in existence. He invented a rheostat with hundreds of steps for the purpose of causing anesthesia by electricity, and made mention of a rheostat that he invented which was continuously variable, depending on the effect of light on the electrical conductivity of selenium.
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