BACTERIOLOGY. 191 



the ordinary stains and will not retain Gram's stain. 

 It is the cause of green pus in a wound. It produces 

 the green color to the pus of old sores. 



Stain a spread of bacillus Flouresence Liq., and 

 note the likeness of the two. 



Stain the dejecta at your desk and make out the 

 morphology of the species, and try to differentiate the 

 colon bacilli from the typhoid bacilli, if such are pres- 

 ent. Consult the atlas and find the germs which are 

 most like 'the ones on the slide. 



What lesson of practical value can you get from this 

 experiment ? 



How do you determine the power of any germicide ? 

 Note the process in your notebook. 



How would you get the material to the city bacteri- 

 ologists ? 



Name five diseases which you must report to the 

 city authorities. 



How would you make an examination of milk in 

 case you were called on to do so? 



What bacteria are most likely to be in the milk? 



