twenty cities in the United States and a wholly-owned subsidiary which is devoted exclusively to distributing its product in Canada. Approximately 75 per cent, of its product is shipped out of Pennsylvania.
Summarizing these operations, the Labor Board concluded that the works in Pittsburgh and Aliquippa “might be likened to the heart of a self-contained, highly integrated body. They draw in the raw materials from Michigan, Minnesota, West Virginia, Pennsylvania in part through arteries and by means controlled by the respondent; they transform the materials and then pump them out to all parts of the nation through the vast mechanism which the respondent has elaborated.”
To carry on the activities of the entire steel industry, 33.000 men mine ore, 44,000 men mine coal, 4,000 men quarry limestone, 16,000 men manufacture coke, 343,000 men manufacture steel, and 83,000 men transport its product. Respondent has about 10,000 employees in its Aliquippa plant, which is located in a community of about 30.000 persons.
Respondent points to evidence that the Aliquippa plant, in which the discharged men were employed, contains complete facilities for the production of finished and semi-finished iron and steel products from raw materials; that its works consist primarily of a by-product coke plant for the production of coke; blast furnaces for the production of pig iron; open hearth furnaces and Bessemer converters for the production of steel; blooming mills for the reduction of steel ingots into smaller shapes; and a number of finishing mills such as structural mills, rod mills, wire mills and the like. In addition there are other buildings, structures and equipment, storage yards, docks and an intra-plant storage system. Respondent’s operations at these works are carried on in two distinct stages, the first being the conversion of raw materials into pig