OF CELLS UNFOUNDED. 43 



the Evolution argument, I contend, is not thereby 

 strengthened. 



When, by virtue of their original intrinsic quali- 

 ties, differently composed and endowed cells are, 

 under the appropriate conditions, developed into 

 tissues, for example, each kind in its own proper 

 way, we may truly call the process one of ' differentia- 

 tion ; ' but there is certainly no such process, if by 

 the expression is meant the development of different 

 kinds of tissues from one and the same kind of cells 

 by their own desires and efforts. The reality of 

 such a process is, in fact, the very thing to be con- 

 tested, as the false foundation on which the super- 

 structure of Evolution has been, in a great measure, 

 built. 



Though resembling each other in their general 

 characters, organic cells, let me repeat, are of various 

 kinds each kind possessing its own peculiar endow- 

 ments physical and vital and its own mode of 

 further development into tissues and organs. One 

 kind of cells cannot give origin to another kind with 

 different endowments, nor be developed by the 

 chance of circumstances into this or that kind of 

 structure. Cells react vitally under varying condi- 

 tions, but each only in its own way. If the condi- 

 tions be unusual, the cell still reacts after its own 

 manner, according to its inherent endowments, so 

 far as the unusual conditions permit. The cell may 

 indeed become morbid, languish, and die under the 



