Thomas Alva Edison: Inventing the Light Bulb

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And yes the inventor does go by his middle name. Sits attentively in a chair is blue. Green is fixated as he cautiously watches the liquid metal known as mercury to send long vertically oriented tube on his spring style vacuum pump. The mercury's flow suctions air from a pear-shaped glass or bowl. Attached via a second tube. This glass bowl is latest. Iteration of an incandescent light but before he sends electricity's through its copper wires and across the thread connecting them or film it as it's called the brown haired inventors using this pump to remove as much air from the ball possible. That's how he gives his little filament of fighting chance of not burning to a crisp trista zaps it with temperatures as high as five thousand degrees fahrenheit. See those temperatures are why the film is the key thing here. Alva- would have a marketable incandescent light. If only he could find something able to take the heat. He's performed countless experiments over the past year. And this time. He's using carbonized. Cotton thread here. We go again. The mercury starts pulling sizable air bubbles. Al now heats glass bulb with an alcohol flame thus expanding the remaining gases inside who this delicate work one mistake and days of effort will go to waste but as the hours pass. Things continue smoothly. The mercury is now dripping faster. One of alvis assistance nineteen year old francis gel grabs the jar collecting mercury at the bottom of the pump. Replaces it with a new one. Then ascends a stepladder deported. Liquid back into the contractions reservoir. Meanwhile alva- cautiously starts using a battery to provide any electrical current to the bulbs to wires the flow of mercury continues to evacuate air from pear-shaped glass as the film inside. Glose after ten hours of this. The bulbs ready. It's time to see if this filament is the

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