It is known that calcined gypsum, after being moistened with a solution of alum and again burnt, acquires much greater hardness and solidity. Another process is to make a solution of one pound of ...

during which he made known the very important fact that the largest gypsum field in the world lies about three hundred miles west of Fort Smith, Ark., in the plains explored by Capt. Marcy last ...

The U.S. Department of Labor’s Occupational Safety and Health Administration has certified U.S. Gypsum Company in Weirton, W.Va., as a “Star” site, the highest honor in its Voluntary Protection ...

Demographic data shown in this section was gathered from the latest U.S. Census Bureau release, the 2022 American Community Survey. The information is updated yearly, as soon as new data is made ...