Alexander Graham Bell's metal detector
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Presidential Trivia on X: "In 1881, Dr. Alexander Graham Bell used the metal detector he invented to search for the bullet in President Garfield. The device is now part of the Smithsonian's
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Alexander Graham Bell's metal detector
Alexander Graham Bell's metal detector
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Alexander Graham Bell, Metal Detector, 1891 - Stock Image - C043/8920 - Science Photo Library
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Who Invented Metal Detector ?
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The History and Use of Metal Detectors
