LABORATORY TECH NIC 41 



be observed when the germs grow upon bouillon containing 

 the sugars. This broth is placed in an apparatus called a 

 fermentation tube, so arranged that the percentage of sugar 



FIG. 13. Method of transferring cultures from one tube to another. 

 (Hiss and Zinsser.) 



broken up by the bacteria can be estimated. When he shall 

 have made all his observations he will sum up his results and 

 identify according to the classification of bacteriologists. 



FIG. 14. Hollow slide with cover-glass. (Park.) 



The presence of bacteria is searched for in pus and dis- 

 eased tissues by making a smear from the fluid or affected 

 part upon glass slides and treating it with certain dyes. 



