America's 20th president, James Abram Garfield, was once a major attack. The events of morning on July 2, 1881 He was shot twice by an unknown person in a railway station in Washington. A bullet touches one of his arms. So there was no damage. But another bullet enters the inside of the body in the lower part of its pancreatic tract. After the accident, it is normal to take out the operation after the operation, but there is problem in the dam. Doctors did not have any sign of the bullet but many times. After entering the body of the President, the bullet shuffle with the ribs. Even the most effective information about the inside position of the body, even from the firing entrance, was not yet available. Gargield was a Republican and a strong Western president. In 1880 he was elected president. But after a year of fate, he had to die in the hands of an assassin named Charles Gate. The president shot dead from behind. During this incident there were many people around him, so the assailants were caught immediately. Local doctor said. Bliss went to the spot and found that Garfield's appearance had become almost faded. But he still had his consciousness. He told the doctor about his numbness. After taking Garfild from here, doctors thought that he could not be saved. Because at 11 o'clock, his pulse rate was 158 bits per minute, breathing was running 35 times per minute and body temperature dropped to 96.5 degrees. But in the middle of the night his condition goes a little better. The pulse rate came down to 120 bpm per minute, breathing process was running 20 times per minute and body temperature rose to 98 degrees. The doctors assured him that he might be saved. The President ordered all of them to do whatever they wanted to do. As President of the United States, maybe the matter is lost with the matter. Because death is inevitable if the inside shot is not carried out. Such situations are often made in medical science. But then the difference is different. Because the medical science did not get so much improvement till then. Still have to try. So, there is a curious concept to find the bullet.

It was during this time that the telephone was discovered in the days and it was publicly publicized. Alexander Graham Bell, then a famous name. He called for finding out where his body is hiding. Like a metal detector, Bell had a machine that could detect metallic substances, which is called Induction Balance .Electromagnet which runs through the battery. Another was a small coil which was fitted with the telephone receiver. At that time, the receiver had heard things like this receiver and the other side. The battery always sends the steady current through the electromagnet. This resulted in the formation of a magnetic force around the electromagnet.

After this process came to mind, Bell created a practical method. He kept the receiver's coil in such a way that the magnetic force was vertically along with it. If the ball can bring any change in this ball through the coil, then the coil will produce an electrode, and as soon as it is generated, a randomized click will be generated that will be captured in the receiver.


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