METHODS OF EXAMINATION. 485 



with the blue. After being stained the films are washed in 

 water, dried, and mounted in balsam; those stained with 

 Ehrlich-Biondi fluid are for some purposes best examined 

 in the dry condition, the cover-glass being fixed at its 

 margins to the slide by balsam, the film downwards, but 

 not in contact with the slide. 



