CHAPTER IX 



SUPPOSED INSTANCES OF TEANSMUTATION 

 BROUGHT ABOUT EXPEEIMENTALLT 



I. Major Hobeocks' s Experiments. {Journal of R.A .M. C. 

 Vol. XVI.) 



In March, 1911, Major Horrocks published the records of 

 a series of experiments of great interest. The results of these 

 experiments may be briefly summarised as follows : 



(a) From a strain of B. typhosiis (derived from the 

 urine of a carrier) he obtained, by subculture, an organism 

 intermediate in its characters between B. typhosus and 

 B. coli. 



(b) From a second (laboratory) strain of B. typhosus, by 

 symbiosis with jB. coli, he obtained an organism which produced 

 slight acidity in mannite but fermented no other sugars, and 

 which later reverted to B. typhosus. 



(c) From a third (laboratory) strain of B. typhosus, by 

 symbiosis with the same strain of B. coli, he obtained an or- 

 ganism closely resembling B.faecalis alc<digenes. 



(d) From a fourth strain of B. typhosus (derived from the 

 urine of another carrier), after injection into the peritoneal 

 cavity of a guineapig, he obtained a Gram-positive coccus 

 resembling streptococcus faecalis. 



(e) From a fifth strain of B. typhosus (derived from the 

 urine of a third carrier), after injection into the peritoneal 

 cavity of a guineapig, he obtained in three different ex- 

 periments a coliform organism which differed widely in its 

 fermentation and agglutination properties from B. typhosus. 



(/) From a sixth strain of B. typhosus (derived from the 

 stool of a fourth carrier), after growth in the diluted and 

 filtered urine of another carrier "S," he obtained B.faecalis 



