| 1. | It was finally used eventually used for spinning and weaving gas mantles.
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| 2. | Thorium gas mantle is a portable source of light that requires no electricity.
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| 3. | The gas mantle boosted the luminosity of utility lighting and of kerosene lanterns.
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| 4. | Half of this thorium produced is used in gas mantles.
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| 5. | Gas mantles are impregnated with the same radio active thorium.
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| 6. | In 1891 the gas mantle was invented by the Austrian chemist Carl Auer von Welsbach.
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| 7. | About half of the produced thorium is used as the light-emitting material of gas mantles.
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| 8. | As well as his own company, it was specialized in chemical products and gas mantles.
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| 9. | The company soon had 300 employees and produced about 30, 000 gas mantles a day.
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| 10. | After arriving in the New York area, Washington founded a company producing kerosene gas mantles.
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