SECTION C. ON THE PROPERTIES OF ANTI- 

 IMMUNE-BODIES 



Of papers published within recent years which concern the 

 properties of immune-sera and bear upon the general theory 

 of immunity, one of the most important is that of Bordet l on 

 antisensibilisatrices (anti-immune-bodies, anti-amboceptors). 

 This observer obtained an anti-immune-body by injecting 

 the serum of a normal animal (rabbit) into an animal of 

 another species (guinea-pig), and found that there was 

 developed an anti-immune-body which had the property of 

 neutralizing the various immune-bodies which might be 

 developed by active immunization of the first animal. In 

 this way a certain community as regards combining pro- 

 perties was demonstrated among the immune-bodies of a 

 given species of animal. He studied the properties of the 

 anti-immune-body, and in particular showed that it did not 

 combine with the cytophile group of the immune-body, and 

 therefore did not prevent the usual combination of the cell- 

 receptor with the immune-body. This fact he held to be 

 inconsistent with Ehrlich's views regarding the amboceptor 

 constitution of immune-body. His observations on the 

 neutralizing effect of the anti-immune-body were carried out 

 by means, of haemoly tic sera.. Ehrlich and. Sachs 2 confirmed 

 the chief rssiiltfc otitained by BoVclelyftulo so far from admit- 

 ting the ,esjbabys]3ine ( nt pf any objection.. to the amboceptor 

 theory, claimed tW^ t&cjy s upj>tif<i ^ r S- sv^ence in support 

 of it. They maintained, in fact, that the anti-immune-body 

 acted by combining with the complementophile group of the 

 amboceptor, and thus prevented the union of complement, 



1 Bordet, Ann. de Vlnst. Pasteur, 1904, Tome xviij, p. 593. 



* Ehrlich and Sachs, Berlin. Ein. Wochenschr., 1905, pp. 557, 609. 



