194 Plant Physiology 



Bur. of Plant Ind., U. S. Dept. of Agl. Bui. 113 : 22 pp., 

 1907. 



LOEB, J. Toxic and Antitoxic Effect of Ions. Studies in Gen- 

 eral Physiology. Part II, Chap. 36, etc., 1905. 



LOEW, O., and MAY, D. W. The Relation of Lime and Magnesia 

 to Plant Growth. Bur. Plant Ind., U. S. Dept. Agl. Bui. 1 : 

 53 pp., 1901. 



LOEW, O. The Physiological Role of the Mineral Nutrients. 

 Bur. Plant Ind., U. S. Dept. Agl. Bui. 46 : 70 pp., 1903. 



OSTERHOUT, W. J. V. The Importance of Physiologically Bal- 

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 Ibid. 44 : 259-272, 7 figs., 1907. 



Die Schutzwirkung des Natriums fiir Pflanzen. Jahrb. f. 



wiss. Bot. 46 : 121-136, 3 figs., 1908. 



