ADDITIONS TO THE REVISED EDITION OF 1880. 263 



ent upon syphilis, glanders, lupus, or consumption. At all events, 

 compared with pneumonic deposits, tubercle is of secondary impor- 

 tance in consumption, it being neither characteristic nor constant in 

 the disease. We know nothing about the intermediate steps of the 

 process of infection between the original deposit and the forming of 

 new tubercle. An embolism would seem most probable as a first 

 step, but such emboli are not always found in fresh tubercle. Ac- 

 cording to Walderiburg> very fine particles, no bigger than blood- 

 disks, are taken into the circulation and then deposited in the tissues. 

 The author has found miliary tubercles deposited about a speck of 

 aniline which had been injected. Buhl believes that the cheesy 

 matter and lymph impart to the blood a specific poison, through 

 the diffusion of which the formative irritability of the connective 

 tissue and lymphatic endothelium is awakened into production of 

 cells and nuclei. 



