48 LABORATORY BACTERIOLOGY 



EXERCISE XVII 



THE MORPHOLOGY OF BACILLUS 



73. The bacilli which are to be studied in this exercise ex- 

 hibit in addition to the rod-shaped bodies the essential mor- 

 phological variations of this genus, viz., number of flagella, 

 capsules, and spores. The two latter are held in common with 

 the bacterium. The staining of the organs of locomotion 

 (flagella) and the spores will be taken up in separate exercises. 



74. Work for this Exercise. — Carefully examine and study 

 the cultures made in Exercise XVI., following the directions 

 given for the examination of cultures and preparations in that 

 exercise. 



State fully in the notes the generic characters of the genus 

 Bacillus. 



Inoculate a tube of bouillon and one of agar from each of 

 the cultures, which will be furnished, of a Bacterium and Spi- 

 rillum. Place the inoculated tubes in the incubator. 



