PREFACE XIX 



experiments were made were kindly cut for me by 

 Dr. Moore Alexander. Professor Benjamin Moore 

 advised us in our researches to isolate the active auxetics 

 from the extracts of dead tissues, and Dr. H. E. Roaf 

 very kindly supplied us with the crystalline haemoglobin 

 from which globin was obtained for the first ex- 

 periments with that substance. 



I cannot close this Preface without signifying my 

 thanks to Dr. Macalister. He grasped that this in- 

 vitro method would bring fruitful results, and it was 

 he who instituted this research into the cause of 

 cancer. Dr. Macalister's advice and constant encour- 

 agement, apart from the actual experimental work 

 which he has done and the clinical observations which 

 he has made, have been invaluable. 



