LABORATORY WORK IN DAIRY BACTE- 

 RIOLOGY 



IT is expected that the experiments in this section shall ac- 

 company the study of the text. Recognizing, however, that 

 different classes of students will have different times and con- 

 veniences for laboratory work, the two parts of the subject have 

 been separated. It must be emphasized, however, that the prac- 

 tical work is fully as important as the theoretical discussion, 

 and no one can really understand the latter without the former. 

 The course of experiments outlined will probably be too long 

 for short courses. For this reason the important experiments 

 that should be performed without fail are indicated by *. 

 These are fundamental. The others may be taken as time per- 

 mits. It will frequently be a good plan to divide the experi- 

 ments not thus marked among different sections of the class, 

 having each section report the purpose, method and result of 

 such experiments to the whole class. 



The directions for these experiments are given in sufficient 

 detail, so that anyone with a fair knowledge of laboratory meth- 

 ods can follow them without other instruction. The private 

 student of dairying may, therefore, carry out this laboratory 

 course by himself, although, of course, it will take more time 

 in this case than if adequate personal instruction were ob- 

 tained. 



Special emphasis should be placed upon the necessity of care- 

 fully LABELING every culture made and recording in a note book 

 each experiment, its purpose and results* 



263 



