LYMPHOID NATURE OF TUBERCLE. 527 



be the case, the real constituents of the granule, with 

 normal tissues of the body, you will remark the most com- 

 plete correspondence between them and the corpuscles 

 of the lymphatic glands, and this is a correspondence 

 which is neither accidental nor unimportant, for was it 

 not known even of old, that lymphatic glands have an 

 especial tendency to undergo the cheesy degeneration ? 

 Even the old writers have stated that a lymphatic consti- 

 tution disposes to processes of this kind. 



"With regard to pus, I need only remind you that we 

 have been occupied during several lectures in discussing 

 the question of _ the possibility of diagnosing between 

 pyaemia and leucocytosis, and that we have recognized 

 in the colourless corpuscles of the blood bodies so per- 

 fectly analogous to pus-corpuscles, that some have thought 

 they saw pus when they had colourless blood-corpuscles 

 before them, whilst Addison and Zimmermann, on the 

 contrary, imagined they had found colourless blood-cor- 

 puscles when they really were looking upon pus. Both 

 have a like type of formation. It may therefore be said 

 that pus has a Jiamatoid form, nay, the old doctrine may 

 be revived afresh, namely, that pus is the blood of patho- 

 logy. But if one would seek a distinction, if one would 

 be able to say in individual cases what is pus and what 

 blood-corpuscles, there is no other criterion than to deter- 

 mine whether the cell arose at a spot where a colourless 

 blood-corpuscle might be expected to arise, or at one 

 where it ought not be produced. 



So, moreover, we find amongst pathological new-for- 

 mation a large category, the natural type of which is 

 epithelium Epitheliomata, if you will. But the term 

 epithelioma, which has recently been introduced by Han- 

 nover, is completely inadmissible in the case of the par- 

 ticular kind of tumour which it was intended to designate, 

 because the epithelioma is by no means the only tumour 

 whose elements bear the character of epithelial cells. 



