PART II 

 SYSTEMATIC HISTOCHEMISTRY 



The part of the book which follows contains the descrip- 

 tion and critical evaluation of histochemical techniques for 

 various substances. No claim is made to include all tech- 

 niques ever described; in fact, for each substance only one or 

 a few methods of proved value will be recommended, al- 

 though some untested methods and methods of historical or 

 theoretical interest will also be mentioned. The techniques 

 as given in detail do not necessarily follow the exact specifi- 

 cations of their authors; they may be slight modifications, 

 found to be more satisfactory or simpler than the original 

 procedures. 



