Collier's New Encyclopedia (1921)/Donora

DONORA, a borough of Pennsylvania, in Washington co. It is on the Pennsylvania and the Pittsburgh and Lake Erie railroads, and on the Monongahela river. It is the center of an important coal mining and agricultural region, and has manufactures of steel wire, chemicals, gas mantles, etc. Pop. (1910) 8,174; (1920) 14,131.