| Our science books are full of successful
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| | put in this project. Later on however,
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| inventions of Thomas Edison like
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| | he a earned lot of money after he
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| electricity, phonograph and many others,
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| | continued his work on the phonograph and
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| but there is hardly any mention about his
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| | motion pictures etc.
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| failures. One of his most peculiar
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| | It was a challenging task for both Edison
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| failures was his lack of ability to find
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| | and the American economy to find an
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| an effective way to excavate iron ore.
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| | economic way to produce steel at cheaper
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| If he had been successful in excavating
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| | rates. After 1840 the American iron
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| iron ore, he would have been a
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| | industry was going thru a resurgence as
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| billionaire at that time and the
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| | American was not one of the major steel
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| possibilities that would have been
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| | producer in the world.
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| generated after excavation like creation
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| | In 1844, government surveyors traced huge
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| of millions of jobs, and many other
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| | deposits of iron ore of anthracite in the
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| inventions.
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| | Great Lakes area. After this
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| Iron is the most economical of all the
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| | Pennsylvania became known as America's
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| metals available for mining, and yet at
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| | largest supplier of iron and steel.
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| the same time is of no use in its pure
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| | A British engineer named Henry Bessemer
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| form. Pure Iron is very delicate and
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| | invented a process for steel extraction
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| cannot be used to manufacture any
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| | process. He accomplished the incomplete
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| products. It is silver in color in its
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| | task of Thomas Edison. He devised an iron
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| pure form. Its gets its gray color after
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| | smelting process thur which it was
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| it is combined with oxygen. Iron can not
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| | feasible to produce large quantities of
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| be put any practical application in its
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| | steel. This process is still used by
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| pure form.
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| | some manufacturers even today.
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| Hence it was important that an effective
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| | His invention was quite inexpensive and
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| extraction process was discovered. For
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| | provided an efficient process to produce
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| ten years, from 1880 to 1890, Edison
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| | steel from iron ore. But still a refined
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| carried out many experiments, hired the
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| | process was invented by Abram S. Hewitt
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| services of scientists, to find a novel
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| | who even improved on Bessemer process of
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| way to extract iron ore. He was doing
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| | Andrew Carnegie. He soon became a steel
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| this to extract iron ore for the
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| | tycoon that by his improved process of
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| Pennsylvania steel mills.
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| | developing the open-hearth converter and
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| He shifted from his comfortable office to
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| | his process was preferred over that of
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| work in the old iron mines to look for an
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| | Bessemer by American steel manufacturers.
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| economical way to meet with the growing
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| | The American steel industry was
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| demand of steel . His experiments of
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| | revolutionised with the invention of low
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| testing and processing were getting very
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| | cost steel production. American Industry
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| expensive and he had to sell all his
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| | was now the leader in the world in steel
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| stock in General Electric to fund his
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| | production. In 1873 alone, America
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| invention. His heirs must be regretting
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| | produced nearly 115,000 tons of steel.
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| his decision even today.
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| | It was now possible to use steel in many
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| Edison could not succeed to extract the
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| | industries because of fall in its prices.
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| iron from unusable, low grade ores. He
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| | Automotive industry in America is the
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| had to finally abandon this project. He
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| | major (nearly 70%) user of finished steel
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| could never recover his money that he had
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| | in America.
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