228 



BACTERIOLOGY. 



animal must be kept under observation often for weeks, 

 In these cases it is important to note the progress of 



d guinea-pig 

 al condition 



d weight of 

 rwise unde 



re 

 l o 



mpe 

 An 



the disease by its eifect upon the physical condition of 

 the animal, viz., upon the nutritive processes, as evi- 



