52 ORGANISED FLUIDS. 



them are likewise sufficient to show the fallacy of that just 

 referred to. 



By Dr. Martin Barry the white corpuscles are considered 

 to be the last stage of the development of the red blood disc, 

 and he has assigned to them the designation of "parent cells" 

 under the impression that the granules, of which many are 

 contained in each corpuscle, become developed into new 

 blood discs ; this idea of Dr. Barry is purely hypothetical, 

 and its accuracy is but little probable. 



Mr. Addison also believes that the white corpuscles repre- 

 sent an advanced condition of the growth of the red blood 

 disc, but he differs from Dr. Barry, however, in not con- 

 sidering them to be parent cells, filled with young embryos, 

 designating the white corpuscles " tissue cells," under the 

 belief that they become incorporated with, and constitute an 

 integral portion of the solid structures of our framework. 

 The value of this theory has already been discussed. 



Mandl denominates the white corpuscles "fibrinous glo- 

 bules" and he conceives that the nuclei, which he states be- 

 long to all red corpuscles of the blood, as well as the white 

 globules, are not primary formations, but secondary, that 

 these structures do not exist in the blood while circulating 

 within the body, but that they are formed after its abstraction 

 therefrom ; and M. Mandl further states, that the steps of the 

 formation of the white globules may be witnessed on the port 

 object of the microscope. That this view is incorrect not the 

 shadow of doubt can be entertained. The regular form and 

 size of the white globules, their presence in the blood the 

 moment after their abstraction from the system, but'especially 

 the fact that they may be seen in vast quantities in that fluid 

 while still circulating in the capillaries, all negative the idea 

 of the formation of the white globules out of the system, in 

 obedience to a mere physical law. 



Mr. Wharton Jones, in a recent communication made to 

 the Royal Society, has bestowed upon the white corpuscles 

 the appellation of " granule cells" and that gentleman con- 

 siders them to represent an early stage in the development of 

 the red blood globule. The peculiar views entertained by 



