ELEMENTARY BACTERIOLOGY LABORATORY EXERCISES 7 
objective. Focus on the edge of the colony and study its structure. Place a cover 
glass over the growth and examine under the 4 m.m. objective. Note the char- 
acteristics of the hyphae, the reproductive cells and spores. In addition make a 
wet preparation from the mold growth and examine under the 4 m.m. objective. 
Make drawings. 
Examine the organic infusions for protozoa. Note the different types ob- 
served and identify representatives of the three main groups—amoebae, ciliates, 
and flagellates. Make drawings. 
