TUBERCULOSIS. 385 



viously found that tuberculosis in animals may 

 result from inoculation with a variety of organic 

 products of non- tubercular origin, and even from 

 the inhalation of inorganic particles ; which also is 

 recognized as a cause of pulmonary consumption 

 in man. As an example of the numerous experi- 

 ments of this kind, we may refer to the results 

 obtained by Brunet, who inoculated seven rabbits 

 with cancer, six with simple pus, and six with 

 tuberculous material. Of those, fourteen became 

 tuberculous, namely, six of those inoculated with 

 cancer, three of those inoculated with pus, and 

 five of those inoculated with tuberculous matter. 



Schottelius found that miliary nodules in the 

 lungs resulted, in dogs, alike from inhalation of 

 pulverized spray sputum of bronchitis and of 

 phthisis. 



Toussaint affirms that the tubercular deposits 

 resulting from inoculation with non-tubercular 

 material are not infectious, and that experimental 

 pseudo-tuberculosis may be distinguished from 

 tuberculosis proper by inoculation experiments, 

 although the pathological anatomy of the two 

 diseases is identical. 



Koch, on the other hand, does not admit that 

 tuberculosis can be produced by material from 

 which living tubercle bacilli or their spores are un- 

 questionably excluded. In his own experiments 

 he found that in all cases where the material used 

 for inoculation contained living bacilli or spores, 

 the result was positive in animals liable to infec- 



25 



