46 LABORATORY BACTERIOLOGY 



Measure carefully with the filar micrometer the length and 

 thickness of 8 individual bacteria in the stained prepara- 

 tion of the bacillus. Record the measurements in microns 

 (written /a) . (For the use of the micrometer see appendix, 

 also chapter on magnification and micrometry in " The Micro- 

 scope," by Professor S. H. Gage.) 



Inoculate a tube of bouillon, one of gelatin in incubator, and 

 one of agar from a culture (furnished) of each of the fol- 

 lowing genera of bacteria. 



A micrococcus (staphylococcus form) . Micrococcus . . , 

 A sarcina Sarcina . . . 



