130 Recognition of the Individual hji Haemolytic Methods 



and other observers have proved the same fact for the transplantation 

 of the thyroid gland and the ovary. It is a matter of common know- 

 ledge that the blood cells, both red and white, live considerably longer 

 in their own serum than in that of another individual of the same 

 species and a considerable amount of similar indirect evidence is 

 available. 



In view of the above facts we are probabl3' justified in assuming 

 as a working hypothesis that, at any rate in the case of the warm- 

 blooded animals, all the cells of the body of an individual are, so to 

 speak, stamped with his individuality and are different from the 

 same cells of any other individual (not a blood-relation), even of the 

 same species. 



REFERENCES. 



(1) Todd, C. and White, R. G. rrocecdingx of tJi>: lluytil Soci'cU/, 11, Vol. Lx.x.xil. 



1910, p. 416. 



(2) . Proceedings of the Royal Society, B., Vol. Lx.\.\iv. liJll, p. 255. 



(3) . Journal of Hygiene, Vol. x. 1910, p. 185. 



