Word: electromagnet
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...left eye near the retina. Unable to reach it frontally the surgeon laid open the back of the eyeball. Then an assistant moved a pencil-like divining rod over the surface until he located precisely the right spot. The surgeon made two small incisions, moved the tip of an electromagnet close, and out popped the splinter...
...Kirby, radio chief of the War Department's Public Relations Bureau, wants to use the Wire Recorder to bring the battlefronts nearer home. With this device the radioman makes his comments into a hand microphone, which would also pick up surrounding battle sounds. The microphone actuates an electromagnet which records the sounds on a thin wire moving through it (by magnetically rearranging the molecular structure of the wire). The spool of wire, loaded with its temporary magnetic record, can then be sent away and "played back'' for radio broadcasting or transcription disk recording...
Shot on July 2, 1881, Garfield died 78 days later, because his doctors, headed by his boyhood friend, Dr. D. W. Bliss, could not locate the assassin's bullet in his abdomen. By using an electromagnet, Telephonist Alexander Graham Bell had figured out the general location of the bullet (see cut), but no operation was performed. A more accurate guess (through deduction) by Anatomist Feneuil Dunkin Weisse was also disregarded, but later proved by autopsy. A wag cracked: "When ignorance is Bliss, 'tis folly to be Weisse." Two Points. Even though X-ray has long been...
...heart of the betatron," explains Inventor Kerst, "is a doughnut-shaped glass vacuum tube between the poles of a large electromagnet" (see cut). Inside the tube, a hot filament gives off electrons. Magnetically guided, each electron circles about the tube 400,000 times, accelerated at each rotation by small 70-volt kicks whose cumulative push gives the particle an energy of 20,000,000 volts within a fraction of a second. These fiercely energized electrons are then either: 1) Released continuously from the tube as a beam of beta rays-whence the betatron's name-which...
...Lawrence is so loath to part with his cyclotron is that he is now engaged in the most significant problem of his career: the effect of neutron rays on cancer of human beings. The cyclotron whirls ions of heavy hydrogen (deuterons) between the poles of a huge electromagnet, then hurls them into a drumlike vacuum chamber. When they are charged with nearly eight million volts of energy, the ions are shot against a target of light metal, usually beryllium. The bullets knock out streams of neutrons, tiny particles about the same weight as protons but carrying no electric charge...