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William David Coolidge was an American physicist and engineer

William David Coolidge (October 23, 1873 - February 3, 1975) was an American physicist and engineer, who made major contributions to X-ray machines. He was the director of the General Electric Research Laboratory and a vice-president of the corporation. He was also famous for the development of "ductile tungsten", which is important for the incandescent light bulb.
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Titre:
William David Coolidge was an American physicist and engineer
William David Coolidge (October 23, 1873 - February 3, 1975) was an American physicist and engineer, who made major contributions to X-ray machines. He was the director of the General Electric Research Laboratory and a vice-president of the corporation. He was also famous for the development of "ductile tungsten", which is important for the incandescent light bulb.
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4781 x 4387 px | 60.0 MB
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40.5 x 37.1 cm | 15.9 x 14.6 in (300 dpi)