La Follette, Robert M. (Robert Marion), 1855-1925, ed, La Follette, Robert M. (Robert Marion), 1855-1925, Handy, William M, Higgins, Charles · Chicago : Making of America · leaf 152
WORLDS PRODUCTION OF IRON … AMERICAN PRIMACY IN IRON AND STEEL 115 orally followed, the Bossomor process and the open hearthprocess. Jhe use of either is determined by the quality ofthe ore. The Bessemer process requires a high grade of ore,one comparntively free from phospliorus, wliile the openhearth process is adapted to…
Science -- United States History · Inventors -- America · Working class -- United States · United States -- Economic conditions · United States -- Defenses · United States -- Social conditions
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