288 A MANUAL OF BACTERIOLOGY 



In addition to the Schizomycetes, various Protozoa, 

 etc., are always present (more or less) in water, and 

 Fig. 57 represents certain animal and vegetal forms 

 found in some potable waters. 



Although the majority of Schizomycetes and Proto- 

 zoa found in waters are harmless, it has been proved 



FIG. 57. INFUSORIA, ETC., IN WATER. 



1, Daphnia. 2, Chilodon. 3, Paramcecium. 4, Acineria. 5, Paranema. 

 6, Cercomonas. 7, Actinophrys. 8, Amoebae. 9, Amoeba diffluens. 10, 

 Protococcus. 11, Diatoms. 12, Desmids 13, Confervse. 14, Spores of 

 fungi. 15, Pieces of vegetable tissue. 16, Amoeba (more highly magnified). 

 17, Cyclops. 18, Cypris. 19, Anguillula. 



that certain outbreaks of typhoid fever, cholera, 

 etc., have been traced to water supplies; and the 

 microbes of typhoid fever, cholera, tetanus, etc., 

 have all been found in drinking waters contami- 

 nated with sewage. Dysentery and tropical abscess 

 of the liver are due to certain species of Amcebce, 



