^.^/^^ 



T j„ , , — -tv^gi^j^ , 



PEEFACE. 



As the inquiry into the origin of Tubercle by the agency of direct irritation 

 or . by septic matter appears to me to be one of the most important advances 

 which have been recently made in the pathology of the disease, I have 

 thought it desirable, at the suggestion of several friends, to publish my 

 observations on the subject in a separate form. The contents of this lecture 

 are almost identical with the verbatim reports which appeared in the spring 

 in the British Medical Journal and the Lancet. I have, however, supplied 

 a few further details from fresh observation, and have in some places slightly 

 expanded the argument where it appeared to require further elucidation. 

 I am, also, by this means, enabled to lay before the profession in greater 

 number the illustrations which appear to me to prove the tubercular nature 

 of the affection thus artificially produced, and I therefore trust that this 

 object will appear to justify the republication of matter which has so recently 

 been broug'ht under their notice. 



*o' 



I must, in conclusion, express my sincere thanks to Mr. H. B. Tuson 

 for the high artistic power which he has bestowed on the elucidation of 

 the disease, and also to Mr. Ford for the great skill and care with which 

 he has executed the plates. * 



22 b, Cavendish Square, 

 Sept. 1868. 



