STAINED FILMS 89 



of the objective is in contact with the oil and nearly 

 touching the cover-slip. 



4. Rack up the condenser until it is in contact with 

 the under surface of the slide. 



5. Apply the eye to the ocular and arrange the plane 

 mirror so as to obtain the greatest possible amount of 

 light. 



6. Rack up the body tube until the stained film 

 comes into view. 



7. Focus the condenser accurately on the film. 



8. Focus the film accurately by means of the fine 

 adjustment. 



