Further Researches into Induced 

 Cell-Reproduction and Cancer 



A FURTHER, INVESTIGATION OF THE 

 CHEMICAL SUBSTANCES WHICH 

 CAUSE THE CELL -DIVISION OE 

 HUMAN LYMPHOCYTES 



By H. C. Ross and J. W. CHOPPER 



IN a former publication (1) l it has been shown 

 that cell-division can be induced in human 

 lymphocytes, polymorphonuclear leucocytes, and 

 certain epithelial cells by means of chemical 

 agents which have been called auxetics (excitors 

 of reproduction). It has also been shown that 

 certain other substances, notably alkaloids, excite 

 amoeboid movements in white blood-corpuscles ; 

 and these substances have been called kinetics. 

 Thirdly, if a mixture of certain kinetics and 

 auxetics is absorbed by the cells, the kinetic, 

 while having no auxetic action of its own, greatly 

 increases (augments) the action of the auxetic 

 in inducing cell-division. 



1 These numbers refer to former publications, which are listed at 

 the end of the last paper. 



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