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Alexander Graham Bell, Metal Detector, 1891 - Stock Image - C043/8920 - Science Photo Library
Pin on Photo-Documents and Artifacts of History
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The History and Use of Metal Detectors
Alexander Graham Bell developed a metal detector as a last ditch effort to locate a bullet lodged in the chest of American President James Garfield in 1881 | The Vintage News
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UK: Father Found $875k Gold Coin on First Day With New Metal Detector
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G.E (Genius Engineers) - MasKingTapE http://inventors.about.com/od/pstartinventions/a/Metal_Detector.htm In 1881, Alexander Graham Bell invented the first metal detector. As President James Garfield lay dying of an assassin's bullet, Alexander Graham ...
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Alexander Graham Bell's metal detector
Metal Detection Technology: walk-through, hand-held, hand-worn, stepped upon and sat on | Transport Security International Magazine
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