42 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



transplanted tumours retained their histological features throughout, 

 with perhaps slight increase in the degree of keratinization. 



He suggests that his findings show that carcinoma must be regarded 

 as a specific process which, under certain conditions, accompanies the 

 hyperplastic heterotopical proliferation of the epithelium, and is not the 

 •culmination of this proliferation. Also he does not find evidence that 



Fig. 3. — Mouse with intraperitoneal transplanted Spiroptera carcinoma 

 107 days after transplantation ; fourth generation. 



inflammatory changes are necessarily in casual relationship to carcinoma 

 at all, for in the mice which gave a very low percentage of carcinomatous 

 development the hyperplasia and inflammatory changes were as, or more, 

 marked than in the rats. 



The original articles are extremely interesting, discussing every 

 question which the experimental results bring up. R. D. P. 



c. General. 



Theory of Vital Phenomena. — Felix Regnault (C. R.Soc. Biol, 

 1919, 82, 1280-2). 'The organism is regarded as made up of two 

 substances, the living substance or energid, and the organic products. 

 The two together form the tissues and are present in variable propor- 

 tions. The tissues may be grouped according to the quantity of organic 

 products which they contain. Certain substances regarded as living are 

 really organic products, such as the blood corpuscles and the sarcolemma 

 of muscles. Protoplasm itself may be an organic product of the 



