396 BACTERIA IN INFECTIOUS DISEASES. 



vestigation be premature. I therefore beg leave to 

 retire from the witness-stand, and to take my seat with 

 the jury, with the understanding that I may be recalled 

 if circumstances enable me to add to the testimony 

 already given. First, however, it may be well to make 

 a summary statement of the evidence presented; which 

 I do as follows : 



" (a) The bacillus described by Koch is found in the 

 sputum of phthisical patients in San Francisco. 



" (&) That this bacillus differs from the micro-organ- 

 isms found in normal human saliva and in bronchi tic 

 sputum, is proved by the color-test (Ehrlich's) and by 

 culture-experiments (see below, i and j). 



" (<?) Tuberculosis in animals may result from inocu- 

 lation subcutaneous with the sputum of tuberculous 

 patients. 



44 (c?) But in several of the animals experimented 

 upon, no evidence of tubercular deposit was found, and 

 in others it was very slight. Total number of animals 

 experimented upon, twelve rabbits, two guinea-pigs, 

 and two dogs. 



" (e) In the animals successfully inoculated, the en- 

 larged tuberculous lymphatic glands in the vicinity of 

 the point of inoculation, and tubercular nodules in the 

 lungs and elsewhere, usually contained the bacillus of 

 Koch. 



" (/) But this was not invariably the case. At least 

 a careful search failed to demonstrate the presence of 

 this bacillus in tubercles found in the lungs of three 

 rabbits (half-grown white rabbit, killed October 8, Ex- 

 periment No. 3 ; large, spotted rabbit, killed October 7, 

 Experiment No. 4; small rabbit killed by subcutane- 

 ous injection of human saliva, October 6, Experiment 

 No. 5). 



" The bacillus of Koch was found in abundance 



