BY BLOOD BIOPLASTS. 



I2 5 



pared in the year 1863. But the facts demonstrated 

 were well known to me, had been described in my lec- 

 tures before 1863, and were particularly referred to in a 

 paper presented to the Royal Microscopical Society 

 in that year. I did not come to the conclusion which 

 has since been adopted by Cohnheim, that an 

 individual white blood-corpuscle passed through the 

 wall of the vessel, and then changed its characters 

 and became a pus-corpuscle, an idea which had been 

 previously advanced by W. Addison and also by 

 Waller ; but my observations led me to believe and 

 of the correctness of the conclusion I am fully satisfied 

 -^-that the particles of germinal or living matter seen 

 in such great numbers outside the vessels in cases of 

 inflammation, result for the most part from the growth, 

 division, and subdivision of minute particles of ger- 

 minal matter which have passed through the vascular 

 wall suspended in the fluid exudation. Many of 

 the masses of germinal matter represented in Fig. 50, 

 pi. XIV, are the descendants of white blood-corpuscles, 

 but they are not the white blood-corpuscles which 

 were previously in the blood, and which were circu- 

 lating in that fluid. They may continue to grow and 

 multiply like other kinds of germinal matter, until at 

 last that rapidly-growing form of bioplasm, the com- 

 mon result of the greatly-increased growth and 

 multiplication of every form of bioplasm in the living 

 body, may be produced. In inflammation of a texture 

 going on to pus-formation, of the pus-corpuscles in 



