DAIRY LABORATORY GUIDE 



INTRODUCTION 



This laboratory manual is published for the benefit 

 of the dairy short courses where the classes are largely 

 made up of farm-boys whose education ranges from 

 the Eighth Grade to High School graduates. Con- 

 sequently it begins with the most elementary work 

 and touches only the practical side, with which every 

 dairy or creamery operator should be familiar. 



Dairy classes are usually large, and where the in- 

 structor cannot give personal attention some students 

 will not grasp the fundamental principles underlying 

 the work. By following the outhne of the manual 

 the student may work out for himself these principles 

 and their application. There is also a growing de- 

 mand for systematic laboratory work in the short 

 courses where a large amount of work is crowded 

 haphazard into a small space of time. The purpose 

 of this manual, therefore, is to aid the beginner in 

 obtaining the greatest amount of benefit from the 

 limited time spent in the dairy short courses. 



Exercises in the operation of boilers and engines 

 are not included in this manual because that work 

 should be taken up in the mechanic arts department. 



