Foetal Haemoglobin and Rh. Antagonisms 



between the red blood corpuscles containing foetal and later haemo- 

 globin, only the former being haemolyzed. One might assume that 

 this difference is the result of a higher average age of the erythrocytes 

 filled with foetal haemoglobin, but the first case makes this hypothesis 

 unacceptable, since all erythrocytes containing foetal haemoglobin 

 were broken down, without the loss of any detectable amount of later 

 haemoglobin. It is more probable that in regard to the factors which 

 cause haemolysis, the red blood corpuscles containing foetal haemo- 

 globin behave differently from those filled with later haemoglobin. 



Received August 1948 



REFERENCES 



1 Korber, E. Inaug. Dissertation, Dorpat, 1866 



2 Von Kruger, F. Z. Biol. 24 (1888) 318 



3 Bischoff, H. Z ges. exp. Med. (1926) 54 



4 Haurowitz, F. Hoppe-Seyl.Z. (1930)186 



5 Brinkman, R. and Jonxis, J. H. P. /. Phvsiol. 88 (1935) 117 



6 — — Ibid. 88 (1936) 162 



7 — Ibid. 80 (1934) 337 



8 Jonxis, J. H. P. Doctor's Thesis, Groningen, 1935 



9 — Bio-chem. J. 33 (1939) 1743 



10 — Maandschr. Kindergeneeskunde 5 (1936) 363 



11 Ibid. 6(1937)356 



267 



