24 W. H. E M I G 



A combination of four dyes should be used only on appropriate 

 materials consisting of a mass of different tissues. Whenever the 

 object presents a uniform structure one or two stains may be 

 sufficient. In searching for a better technique, keep in mind the 

 correlation between dyes and tissue elements. Note the differences 

 between acid, direct, mordant, or basic stains and determine the 

 adaptability of the material by testing separately each of the dyes 

 present in the combination. 



