CHEMOTHERAPY IN MALIGNANT DISEASES 813 



tinguished, but only a long edematous cord can be felt. Usually, as a 

 result of the sixth injection, in favorable cases, the absorption and 

 diminution proceed so that one gets the feeling of an empty sac. In 

 case no intercurrent disease occurs, the animal is cured in about ten 

 days, with a disappearance of all remnants of the tumor." 



As these results were observed after intravenous injection of the 

 mixtures, and as no injury to the body-cells was apparent, it seems that a 

 step forward has really been taken; at least, these investigators have 

 shown that it is possible for chemical substances to pass from the blood 

 and attack tumor cells. Copper and tin have been found to possess a 

 more marked affinity for tumor cells, and the whole subject is probably 

 just at the threshold of further discoveries that may be applied with 

 great benefit to the treatment of human malignant disease. 



