LITERATURE CITED. 



ASKENAST, E. Ueber die Temperature, welche Pflanzen im Sonnenlicht annehmen. Bot. 



Zeitung., 33:441-2. 1875. 

 BARRY, F. The influence of temperature upon chemical reactions in general. Amer. 



Jour. Bot., 1:203. 1914. 

 BEIJERINCK, M. W. Ueber Emulsoidenbildung bei der Vermischung wasseriger Losungen 



gewisser gelatinierendern Kolloide. Zeitschrift f. Kolloid-Chem., 7: 16. 



1910. 



BERMAN, N., and L. F. RETTGER. The influence of carbohydrates on the nitrogen meta- 

 bolism of bacteria. Jour. Bacter., 3:389. 1918. 

 BOROWIKOW, G. A. Ueber die Ursachen des Wachstums der Pflanzen. Biochem. Zeitschr., 



48:230, and 50: 119. 1913. 



BROOKS, S. C. Permeability of cell-walls of Allium. Botan. Gaz., 64:509. 1917. 

 BROWN and TRELEASE. Alternate shrinkage and elongation of growing stems of Cestrum 



nocturnum. Philip. Jour, of Science 13: No. 6. Bot., p. 353. Nov. 1918. 

 CLARK, Lois. Acidity of marine algae. Puget Sound Marine Sta. Publ. 1, No. 22. 1917. 

 CONKLIN, E. G. Effects of centrifugal force on the structure and development of the eggs 



olCrepidula. Jour. Exper. Zool., 22: 356-364. Feb. 1917. 

 DACHNOWSKI, A. The effects of acid and alkaline solutions upon the water-relations and 



the metabolism of plants. Amer. Jour. Bot., 1:412-439. 1914. 

 and GORMLEY. The physiological water requirement and the growth of plants 



in glycocoll solutions. Amer. Jour. Bot., 1: 174-185. 1914. 

 DAKIN, H. D. The catalytic action of amino-acids, etc., in effecting certain syntheses. 



Jour. Biol. Chem., 7:49-55. 1909. 

 DENNY, F. E. Permeability of certain plant membranes to water. Bot. Gazette, 63: 373- 



397. 1917. 

 . Permeability of membranes as related to their composition. Bot. Gazette, 63: 



468-485. 1917. 

 DONALDSON, H. The relation of myelin to the loss of water in the mammalian nervous 



system with advancing age. Proc. Nat. Acad. Sci., 2:350. 1916. 

 FENN, W. O. Similarity in the behavior of protoplasm and gelatine. Proc. Nat. Acad. 



Sci., 2:539. 1916. 

 FREE, E. E. Note on the swelling of gelatine and agar gels in solutions of sucrose and 



dextrose. Science, n. s., 46: 142. 1917. 

 . A colloidal hypothesis of protoplasmic permeability. The Plant World, 21: 141. 



1918. 

 FREUNDLICH, H. Kapillarchemie; eine Darstellung der Chemie der Kolloide und verwandte 



Gebiete, pages 504-511. 1909. 

 GRAHAM, E. A., and H. T. GRAHAM. Retardation by sugars of diffusion by acids in gels. 



Jour. Amer. Chem. Soc., 40: 1900. 1918. 



HAAS, A. R. The reaction of plant protoplasm. Bot. Gazette, 63: 232. 1917. 

 HARDY, W. B. On the structure of cell protoplasm. Jour. Physiol., 24: 158. 1899. 

 HARVEY, R. B. Hardening processes in plants and developments from frost injury. Jour. 



Agric. Res., 15:83. 1918. 

 HATAI, S. Changes in the composition of the entire body of the albino rat during the life 



span. Amer. Jour. Anat., 1:23. 1917. 

 HEMPEL, JENNY. The buffer processes in the metabolism of succulent plants. Compt. 



Rend. d. trav. d. Lab. Carlsberg., 13: No. 1. 1917. 

 HOFMEISTER, F. Die Betheiligung geloster Stoffe an Quellungsvorgange. Archiv f. 



Exper. Pathol. u. Pharm., 27: 395, 1890, and 28: 210, 1891. 

 KARSTEN, H. Die Einwirkung des Lichtes auf das Wachstums der Pflanzen. Jena. 



1870. 

 KITE, G. L. The physical properties of protoplasm of certain plant and animal cells. 



Amer. Jour. Physiol., 32: 146 (especially pp. 161 and 162). 1913. 

 KUNKEL, Louis OTTO. A study of the problem of water absorption. Twenty-third Annual 



Report, Missouri Botanical Garden, pp. 26-40. 1912. 



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