John Van Nostrand Dorr
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- Today I Born in New Jersey in 1872,
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- My name is Thomas Edison
- My name is John Van Nostrand Dorr
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- I was working in gold mine and inventedDorr Classifier
- John Van Nostrand DorrBorn in New Jersey in 1872
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- Dorr worked with Thomas Edison before becoming one of the mining industry’s most prolific inventors, securing over 20 patents for new devices built to improve mines.
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- While working at gold mills in South Dakota and Colorado, he invented the Dorr Classifier
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- Over the course of his career, Dorr was awarded the John Scott Medal for his engineering work, the Chemical Industry Medal for his contributions to the industry, and the Perkin Medal for the financial benefits of his inventions.
- He died in 1962 and was the fourth person to be inducted into the American Mining Hall of Fame, in 1988.
- THANK YOU
- THE END OF THE STORY THANK YOU
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