TUBERCULOSIS. 



393 



tion of miliary tubercles, although by no means 

 directly opposed to this belief. 



An interesting communication relating to the 

 finding of Koch's bacillus in pathological speci- 

 mens which have undergone putrefaction, or in 

 those which have been kept for some time in pre- 

 servative solutions, has recently been made by Vig- 

 nal. This author finds that " putrefaction, even 

 very much advanced, does not seem to interfere 

 with finding the tubercle bacillus. They are also 

 found as easily in pieces kept a long time in 90 

 per cent and absolute alcohol, and in Muller's fluid, 

 as in recent preparations/ 7 



The morphological characters of the tubercle 

 bacillus, as found in sputum, are delineated in 

 Fig. 22. The bacilli are 

 found both within and 

 without the pus-cells, 

 and seem to be espe- 

 cially numerous in the 

 epithelioid cells. They 

 vary greatly in length, 

 and are not infrequently 

 curved or bent at an 

 angle more or less acute. 

 Not infrequently they 



. 



OCCUl' 111 pairS, Or in 

 Vj.,1 i 



little groups, and in 

 some cases it is apparent that they contain endo- 

 genous spores, or that they are made up of a chain 

 of oval elements. . In my " Photo-Micrographs," 



Fig. 22. 



Koch's Bacillus tuberculosis, in sputum ; 

 in stained by Ehrlich's method. X 1000 



(G. M. S., del.). 



