150 



IMMUNIZATION 



Intravenous Injection of Typhoid Agglutinin 

 in a Goat (Madsen and Jorgensen) 



In the first day we observe a very rapid decrease, 

 which is about 1 1 times greater than the regular 

 monomolecular decay which begins about 1-5 days 

 after the injection (as found by extrapolation from 

 the regular curve) and gives a fall to the half-value 

 in 7-5 days. 



Red blood-corpuscles from an animal may be 

 identified by means of a specific haemolysin, obtained 

 by injection of these corpuscles into the veins of 

 another animal. Sachs injected erythrocytes from 

 an ox into the ear vein of a rabbit, and was able 

 to find traces of them after 41 to 92 (average 57) 

 hours; after 46 to 116 (average 72) hours they 

 had disappeared. On the other hand Todd and 

 White identified similar erythrocytes injected into 

 an ox after four days. 



In his experiments on the injection of ox 

 erythrocytes into the veins of a rabbit Sachs 



