212 CHARLES PACKARD 



LITERATURE 



BoRODOWSKY, W. A. 1910 Absorption of beta rays from radium by solutions 

 and liquids. Phil. Mag., vol. 19. 



Hertwig, G. 1912 Das Schicksal des mit Radium bestrahlten Spermachro- 

 matin in Seeigelei. Arch. f. mikros. Anat., Bd. 77. 



Mathews, A. R. 1915 Physiological chemistry. 



Packard, C. 1914 The effect of radium radiations on the fertilization of Ne- 

 reis. Jour. Exp. Zool., vol. 16. 



1915 The effects of beta and gamma rays of radium on protoplasm. 

 Jour. Exp. Zool., vol. 19. 



Richards, A. 1914 a The effect of X rays on the rate of cell division in the 

 early cleavage of Planorbis. Biol. Bull., vol. 27. 



1914 b The effect of X rays on the action of certain enzymes. Am. 

 Jour. Physiol., vol. 35. 



Rutherford, E. 1913 Radioactive substances and their radiations. 



Wood and Prime 1915 The action of radium on transplanted tumors of ani- 

 mals. Annals of Surgery, December. 



