MORBID STRUCTURES, ETC. 143 



it was rendered transparent, and gradually dissolved, upon which 

 many minute cells with a sharp outline came into view, being 

 unaffected by the acid (Yogel). 



Fig. 44, 



There seems no distinction between tuberculous matter and 

 that of scrofula or typhus. Fig. 45 exhibits tubercles in vari- 

 ous stages of development. A, B, C, tubercles from the lungs 

 of a young man who died of tuberculosis pulmonum. 



A, B, nuclei in an amorphous cytoblastemaj most of the 

 nuclei contain nucleoli. At C the cytoblastema has disap- 

 peared and the cells are in contact. D, tubercular cells, from 

 the lungs of another young man. Here the cytoblastema has 

 also disappeared, and the nuclei are enclosed in a cell-wall ; 

 no nucleoli are present. 



2. Carcinoma. In cases of true scirrhus, the matrix or 

 stroma is constituted either by a new development of cellular 



