DAIRY BACTERIOLOGY 



79 



EXERCISE -XIX 



Dairy Bacteriology 



Examine microscope carefully under the direction 

 of the instructor and ascertain difference between 

 high and low power objectives with different eye 

 pieces. Manipulate reflector, condenser, and dia- 

 phragm to ascertain various combinations. 



Fig. 41 



The above cut represents a portion of a drop of 

 milk containing F, fat globules, L, leucocytes, Y, 

 yeast, and B, b, c, s, T, 1 and 2, seven species of 

 bacteria frequently found in milk. B represents 

 the hay bacillus group which are among the largest 

 known species of bacteria, and frequently form 

 chains; b represents one species of bacillus viscosus 



