150 MICRO-ORGANISMS AND DISEASE. [CH. xvi. 



but not by feeding. He also found 1 in twenty out of twenty- 

 one healthy pigs^ examined, the actinomyces present in the 

 crypts of the tonsils. 



Israel 2 succeeded in transmitting the disease to a rabbit by 

 inserting into the peritoneal cavity a piece of a human 

 antinomyces-tumour, 



R. Virchow quite recently, 3 in conjunction with 0. Israel 

 and Duncker, ascertained that pork occasionally contained 

 whitish chalky nodules, larger than those due to trichinae, and 

 containing in their interior the actinomyces. 



O. Israel 4 claims to have succeeded in artificially cultivating 

 the actinomyces on solid ox-serum ; in fluid media the growth 

 does not succeed, owing to the swelling up and death of the 

 actinomyces-corpuscles. 



1 Centralbl. f. med. Wiss. 15, 1881. 



2 Ibid, xxvii. 1883. 



3 Virchow's Archiv, vol. xcv. p. 544. 



4 Ibid. vol. xcv. p. 142. 



