46 BACTERIOLOGY. 



posed to be due to the possession of some such form 

 of locomotive apparatus, because similar appendages had 

 been seen in some of the large, motile spirilla found 

 in stagnant water, and it was not until recently that the 

 accuracy of this supposition was actually demonstrated. 

 By a special method of staining Loeffler has been able, 

 in a number of cases, to render visible these hair-like 

 appendages. His method consists in the employment 

 of a mordant, by the aid of which the flagella are caused 

 to retain the staining, and thus become visible. Loef- 

 fler' s method of staining will be found in the chapter 

 devoted to this part of the technique. 



