XVI PREFACE 



has been written by Dr. Macalister. The crucial 

 experiment to try to determine whether my theory 

 regarding the cause of cancer was correct or not was 

 made in the first week of August, 1910. The treatment 

 of all the cases has been carried out under the immediate 

 supervision of Dr. Macalister. 



In much of the latter portion of the experimental 

 work I have derived assistance from Dr. Cropper. He 

 has accomplished nearly all the investigations con- 

 cerned in counting the number of granules contained 

 in eosinophile leucocytes, and has given most valuable 

 assistance in the isolation of the active "auxetics" 

 from the remains of dead tissues, and in the investiga- 

 tion of the inhibitory action of blood-serum, some of 

 which he did entirely himself at my suggestion. 



The Research Department at the Royal Southern 

 Hospital at Liverpool was started by Dr. Macalister 

 in April, 1909, in order that this \vork might continue; 

 Sir William Hartley, J. P., generously supplied funds 

 to last for one year in the first instance. In November, 

 1909, he extended his support for a period of three 

 years, and he also supplied me with the photomicro- 

 graphic camera which I had invented. Some of the 

 expenses attached to these researches, however, have 

 also been defrayed by Mrs. George Holt, Mr. and the 

 Misses Paton, and some of their friends. I would 

 like to take this opportunity of recording my personal 

 gratitude to Sir William Hartley and these ladies and 

 gentlemen, without whose assistance these researches 

 could not have been accomplished. 



I wish also to record the manner in which I was 



