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'Air View of the City of Martinsburg and hosiery manufacturing plant of Interwoven Hosiery Company, the largest in the world. In the eastern Panhandle of West Virginia.'

1. Hosiery Manufacturing Plant, Martinsburg, W. Va.

'Although best known as the principal raw mineral in the manufacturing of glass, Silica sand finds wide use in many other important industries. During the war it was listed as a critical material being used in the manufature of aircraft enginces, steel castings, armor plate, silicate of soda, electrical porcelain, refactories, and many other important was materials. Pennsylvania Glass Sand Corporation's operation in Morgan County is the largest glass deposit in the world.'

2. Pennsylvania Glass Sand Corporation's Operation in Morgan County, W. Va.