Literature Cited. 175 



Llotd, Francis E. Colloidal phenomena in the protoplasm of pollen tubes. Report 

 Dept, Bot. Research, Carnegie Inst, Wash, for 1917, Year Book No. 16. 

 1918. 



. The origin and nature of the mucilage in the cacti and in certain other plants. 



Amer. Jour, of Bot. 6: 156. 1919. 

 LoEB, J. The similarity of the action of salts upon the swelling of animal membranes and 

 of powdered colloids. Jour. Biol. Chem., 31: 343. 1917. 



. Amphoteric colloids, 1: Chemical influence of the hydrogen-ion concentration. 



Jour. Gen. Physiol., 1: 39. 1918. 

 Long, E. R. Growth and colloid hydratation in cacti. Botan. Gazette, 59: No. 6. June 

 1915. 



. Acid accumulation and destruction in large succulents. The Plant World, 18: 



No. 10, 261, 1918. 

 MacCallum, a. M, The distribution of potassium in animal and vegetable cells. Jour. 

 Physiol., 32: 95, 1905, 



, Presidential address, Brit. Assoc, for Adv. of Sci., Report for 1910, 744. 



MacDougal, D. T. The influence of etiolation upon chemical composition, in "The 

 influence of light and darkness upon growth and development." Mem. 

 N. Y. Bot. Garden, 2:300-305. 1903. 

 The Salton Sea: A study of the geography, the geology, the floristics, and ecology 



of a desert basin. Carnegie Inst. Wash. Pub. No. 193. 1914. 

 The experimental modification of germ-plasm. Annals Mo, Bot. Garden, 2: 253- 



274., Feb.-Apr. 1915, 

 Mechanism and conditions of growth, Mem, N, Y. Bot, Garden, 6: 5-26, 1916. 

 Imbibitional swelling of plants and colloidal mixtures. Science, n. s., 44:502- 



505. 1916. 

 The beginnings and physical basis of parasitism. The Plant World, 20 : 238. 1917. 

 The relation of growth and swelling of plants and biocolloids to temperature. 



Proc. Soc. Exper. Biol, and Med., 15 : 48. 1917. 

 The effect of bog and swamp waters on sweUing in plants and in biocolloids. The 

 Plant World, 21 : 88-99. 1918. 

 and W. A. Cannon. The conditions of parasitism in plants. Carnegie Inst. 



Wash. Pub. No. 129. 1910. 

 H, M. Richards, and H. A. Spoehr. The basis of succulence in plants. Botan, 



Gazette, 67:405. 1919. 

 and H. A. Spoehr. The behavior of certain gels useful in the interpretation of the 

 action of plants. Science, n. s., 45:484-488. 1916. 



. Growth and imbibition. Proc. Amer. Phil. Soc, 56: 289. 1917. 



. The effects of acids and salts on biocolloids. Science, n. s., 46 : 269. 1917. 



. The effect of organic acids and their amino-compounds on the hydration 



of agar and on a biocoUoid. Proc. Soc. Exper. Biol, and Med., 16 : 33, 1918, 



. The origination of xerophytism. The Plant World, 21: 245. 1919. 



. The solution and fixation accompanying swelling and drying of bio- 

 colloids and plant tissues. The Plant World, 22:—. 1919. 

 Mathews, A. P. Physiological chemistry, 2d ed. p. 211. 1916. 

 McClendon, J. F. The physical chemistry of vital phenomena, page 95. 1917. 

 McGee, J. M. Theeffectof position on the temperature and dry weight of joints of Opuntia. 

 Rep. Dept. Bot. Research, Carnegie Inst. Wash, for 1916, Year Book No. 

 15. Feb. 15, 1917. 



. The imbibitional swelUng of marine algae. The Plant World, 21: 13. 1918. 



Osterhout, W. J. V. The permeabihty of Uving cells to salts in pure and balanced solu- 

 tions. Science, n. s., 34: 187-189. Aug. 11, 1911. 



. Natiu-e of antagonism. Science, n. s., 41 : 255-256. 1915. 



. Some aspects of the temperature coefficients of life processes. Jour. Biol. Chem., 



32: No. 1. 1917. 

 OsTWALD, W. Ueber zeitlichen Eigenschaften der Entwickelungs-vorgange, page 49. 1908. 



, translated by M. Fischer. An introduction to theoretical and applied colloid 



chemistry, pages 84-92. 1909. 

 , and M. Fischer. Theoretical and applied colloid chemistry. 1917. 



