| 11. | After graduation he was employed by the United States Gypsum Corporation.
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| 12. | The line hauls gypsum rock from the quarry to the plant.
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| 13. | The region is rich in minerals, especially gypsum and marble.
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| 14. | Gypsum mining and a mill still operate today in the community.
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| 15. | Others spar can be found on the tips of gypsum chandeliers.
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| 16. | In the 18th century a gypsum mine opened near the village.
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| 17. | Gypsum wall board typically loses all its strength during a fire.
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| 18. | QuietRock panels are manufactured primarily from gypsum drywall and viscoelastic polymers.
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| 19. | Then in 1849 a Gypsum processing plant opened in the village.
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| 20. | In 1899 a gypsum factory and mine were established in Felsenau.
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