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DAIRY LABORATORY GUIDE 



EXERCISE 2 



THE PHYSICAL DIFFERENCES BETWEEN MILK AND ITS 

 PRODUCTS 



Object: To determine the physical difference micro- 

 scopically between whole milk, cream, skimmilk, and colos- 

 trum, when heated and cooled. 



Apparatus : Samples to be examined and microscope. 



Steps: 1. Place a drop of each sample upon a slide and 

 examine. 



2. Heat the slide gradually and reexamine. 



3. Cool the slide gradually and reexamine. 



4. Diagram the field in each case and record all findings. 



Data: 



Application : 1. In what manner do the various samples 

 differ? 



2. What is the effect of heat upon the samples? 



3. How does cold affect the samples? 



