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Bunge. Physiological and Pathological Chemistry, Chapter 25.

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Macallum. On the Absorption of Iron in the Animal Body. Journal of Physiology, Vol. 16, page 268 (1894); also Proceedings Royal Society (London), Vol. 50, page 277 (1891-1892); Quarterly Journal of Microscopical Science (London), Vol. 38, page 175 (1896).

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Sherman. Iron in Food and its Functions in Nutrition. Bull. 185, Office of Experiment Station, U. S. Dept. Agriculture (1907).

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Tartakowsky. Ueber de Resorption und Assimilation des Eisens. Pflu-gers Archiv fur die gesammte Physiologie, Vol. 100, page 586; Vol. 101, page 423 (1903, 1904).

Von Wendt. Untersuchungen ueber den Eiweiss und Salz-Stoffwechsel beim Menschen. Skandinavisches Archiv fur Physiologic, Vol. 17, pages 211-289 (1905).

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