MICROSCOPICAL TECHNIQUE, ETC. 173 
need not be so dark, and for various reasons the writer 
uses fuchsin to stain bacteria when its use is per¬ 
missible. But if this stain is too heavy, much detail 
of the organisms may be lost in photography. 
Tubercular tissues and sputum preparations show 
extremely well when treated as in the cases cited on 
page 171 for leprous tissue. 
