Bell's 1881 Metal detector

Alexander Graham Bell's 1881 efforts to help save President Garfield's Life. For Sale: Metal Detector Props From The Discovery Channel Program "Forensics in the White House" The program re-examined the technical components of Bells' attempt, in the summer of 1881, to develop a metal detector of sufficient sensitivity to locate an Assassin bullet lodged in President's Garfield's wound. Special Sale ALL the engineering and scientific instruments pictured below were used as props in filming the Discovery program and are for sale. Below are photos and descriptions of working models of Alexander Graham Bell's metal detectors, their circuits, brief descriptions covering the events surrounding their development and use by Bell. This is followed by gripping photos of Discoveries TV crew filming the reenactment of the laboratory scenes of Bell and his assistant developing the detector in his laboratory. The left column below covers the work of 7/26/1881 using the four-coil bridge method ... Read full article.