82 ILLINOIS ACADEMY OF SCIENCE, 



by any simple chemical reaction. Radium rays do not produce 

 an immediate effect upon living tissues, similar to the reduction 

 of silver salts, for example. They have an effect upon the Ufe 

 processes of the cells, and these after a relatively long time pro- 

 duce the results that we recognize as a radium reaction. In other 

 words the process is a vital process, and one, doubtless, involving 

 all of the chemical complexity of cell life itself. 



BIBLIOGRAPHY. 



Halkin, Archiv. f. Dermat, und Syph. 1903, LXV, p. 201. (Histology.) 

 HussAKOF, Louis, Medical Record, July 20, 1907. Action of Radium 

 on Plants and Animals. (Full summary and bibliography.) 



DoMiNici AND Barcat. Archives des Maladies du coeur, des vaiseux 



et du sang, 1908. (Histology.) 



DoMiNici. Archives Generales de Medicine, July, 1909. (Histology.) 

 GuiLLEMONT. Archives of the Rontgen Ray, Vol. XV, No. 3, August, 



1910. (Effects on seeds and plants and bio-chemistry.) 



Baring. British Med. Jour., July 30, 1910. (Efifects on malignant 



tumors.) 



