| The Columbia Encyclopedia, Sixth Edition. 2001-07. |
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| Coolidge, William David |
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| 1873–1975, American physical chemist, b. Hudson, Mass., grad. Massachusetts Institute of Technology, 1896. He joined the General Electric Company in 1905 and served as director of its research laboratory (1932–40) and as vice president and director of research (1940–44). He made special studies of X rays, invented an X-ray tube, and invented and developed ductile tungsten. |
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| | | The Columbia Encyclopedia, Sixth Edition. Copyright © 2007 Columbia University Press. |
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