68 LABORATORY GUIDE IN BACTERIOLOGY 



ing out culture-charts are applicable in the described 

 manner to studies of cultures furnished by the laboratory. 

 For determining any species of unknown bacteria, original 

 researches must be made to cover all points, necessarily 

 without the possibility of gathering this information from 

 textbooks or references. On the accuracy of observation 

 and description depends the success of bacteriological 

 work and species-determination. It is frequently neces- 

 sary to employ special media, or inoculation of animals, 

 or such reactions as the agglutination test, to determine 

 properly what species one is dealing with. 



The student will do well to familiarize himself care- 

 fully with all directions and explanations given in this 

 and the previous chapters. Find a characteristic for 

 each item mentioned; otherwise the descriptions will 

 be incomplete; and follow the instructions for routine 

 work with all possible accuracy. 



