“The Metallurgy of Steel,” Harbord and Hall, Charles Griffin & Co., Ltd., London.

“Liquid Steel,” E. G. Carnegie, Longmans, Green & Co., London.

“Krupp’s Steel Works,” F. C. G. Muller, Wm. Heinemann, London.

“By Bread Alone” (a novel), I. K. Friedman, McClure, Phillips & Co., New York.

CHAPTER I

“The History of the Manufacture of Iron in All Ages,” James Swank, Am. Iron and Steel Assoc., Philadelphia, Pa.

“The Materials of Engineering—Iron and Steel,” Robert Thurston, John Wiley & Son, New York.

CHAPTER II

“The Honorable Peter White,” R. D. Williams, Penton Publishing Co., Cleveland, O.

“The Iron Ore Resources of the World,” International Geological Society, Stockholm, 1910.