The beginnings of cheap steel

by Philip W. Bishop

[ ¹¹⁷]See U.S. Patent Office, Decision of Commissioner of Patents, dated June 15, 1871

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[ ¹¹⁸]U.S. Patent Office, Decision of Commissioner of Patents dated February 12, 1870

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[ ¹¹⁹]William T. Jeans, The creators of the age of steel, London, 1884

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[ ¹²⁰]Bessemer dealt with Kelly's claim to priority in a letter to Engineering, 1896, vol. 61, p. 367

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[ ¹²¹]Louis C. Hunter, "The heavy industries since 1860," in H. F. Williamson (editor), The growth of the American economy, New York, 1944, p. 469

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