138 STAINING 



247. As remarked, the main object of staining is to demonstrate 

 the structures present in the cell. The fact, however, that this 

 appearance is not necessarily that of the living state should 

 never be alloxved to escape remembrance. Without special 

 investigation of the case, it is not permissible to draw conclusions 

 as to the chemical nature of a cell constituent from its behaviour 

 to dyes. 



