MICROSCOPICAL DIAGNOSIS.. 



and the contents placed on a glass-slide with a drop of olive 

 oil, and then covered with the thin glass, one or more of 

 these parasites may be found. The oil causes the hard por- 

 tions around the parasite to separate from it when it can be 

 e moved to a separate slide. 



Fig. 21. 

 Pediculus Capitis. 



Fig. 22. 

 Pediculus Pubis. 



Fig. 23. 

 Pediculus Corpons. 



Pediculosis. There are three varieties of this disease, de- 

 signated according to the names of the species of pediculi. The 

 pediculus capkis, or head louse ; the pediculus corporis, or body 

 louse, and the pediculus pubis. 



