542 PROTOPLASM 



-: Malignant sarcoma cells, Anat. Rec, 58 (sup.): 25 (1934). 



Maximow, a.: Cultures of blood leucocytes, Arch. Exp. Zellforsch., 6: 169 



(1928). 

 Strange WAYS, T., et ah: Differentiation of embryonic tissues, Proc. Roy. 



Soc, B 99: 340 (1926). 

 VoGELAAR, J. P. M., et al: Herstellung von Plasma, Arch. Exp. Zellforsch., 



8: 547 (1929). 

 White, P. R. : Growth of root tips in a liquid medium. Plant Physiol, 9 : 585 



(1934). 



VI. THE COLLOIDAL STATE 



Alexander, J. (ed.): "Colloid Chemistry," vols. I-IV, New York, 1926- 



1932. 

 BoGUE, R. H.: "Theory and Application of Colloidal Behavior," New York, 



1924. 

 Colloid Symposium Monographs, 1-10, New York (1923-1932). 

 DucLAux, J.: "Les Colloides," Paris, 1925. 



Freundlich, H.: "Elements of Colloidal Chemistry," New York, 1924. 

 : "Kapillarchemie," Leipzig, 1932. (Eng. trans., "Capillary 



Chemistry," London, 1926.) 

 Hatschek, E.: "Foundations of Colloid Chemistry," New York, 1925. 

 Kruyt, H. R.: "Colloids," New York, 1930. 



Seifriz, W.: The Spierer lens, Jour. Phys. Chem., 35: 118 (1931). 

 Siedentopf, H., et al: tJber Sichtbarmachung und Grossenbestimmung 



ultramikroskopische Teilchen, Ann. d. Phys., ser. 4, 10: 1 (1903). 

 Spierer, C: Un nouvel ultra-microscope k eclairage bilateral. Arch. Sci. 



Phys. Nat. (Geneve), 8: 121 (1926). 

 Svedberg, T.: "Colloid Chemistry," New York, 1924. 

 Thomas, A. W.: "Colloid Chemistry," New York, 1934. 

 Weiser, H. B.: "Inorganic Colloid Chemistry," New York, 1933. 

 ZsiGMONDY, R.: "Kolloidchemie," Leipzig, 1920. 



VII. EMULSIONS 



Bancroft, N. D.: Theory of emulsification, Jour. Phys. Chem., 17: 501 



(1913). 

 Clayton, W.: "The Theory of Emulsions and Emulsification," Philadelphia, 



1923. 

 Dixon, H. H., et al.: Electrical properties of emulsions and the plasmatic 



membrane, Sci. Proc. Roy. Dublin Soc, 20: 211 (1932). 

 DoNNAN, F. G., et al. : Emulsification of oils and the theory of soap emulsions, 



Koll. Zeit., 7: 208 (1910). 

 Ellis, R. : Properties of emulsions, Zeit. Phys. Chem., 78 : 321 (1912) ; 80 : 597 



(1912). 

 Harkins, W. D., et al.: The oriented wedge theory of emulsions, Science, 



59: 463 (1924). 

 HiLDEBRAND, J. H., et al.: The theory of emulsification. Jour. Am. Chem. 



Soc, 45: 2780 (1923). 



