138 PHYSIOLOGY FOR THE LABORATORY. 



Mount on a glass slide a drop of the liquid containing 

 bacteria. Cover with a cover-glass and examine with high 

 power. 



Notice : 



a. The size of the bacteria. 



b. Their shape and motion. 



B. The Pathogenic Bacteria. 



Materials. Prepared slides of cultures of the bacteria that pro- 

 duce typhoid fever, diphtheria, consumption, and splenic fever. 

 Apparatus. A compound microscope. 



Examine with the microscope prepared slides of bacillus 

 typhi abdominalis (typhoid fever), bacillus diphtherise (diph- 

 theria), bacillus tuberculosis (consumption), and bacillus 

 anthracis (splenic fever). Study as in A. VI. Do you 

 find any cilia? 



a. What other diseases are caused by bacteria? 



b. How is the body able to combat the bacteria? 



c. What is susceptibility to disease? 



d. What is immunity from disease ? 



e. Is consumption hereditary? Explain the most com- 

 mon " cures " for consumption. 



/. What is one method qf treatment for diphtheria? 



g. What is antitoxine ? How is it obtained ? 



h. What is vaccination ? Give reasons for and against 

 it. 



