82 



DAIRY LABORATORY GUIDE 



EXERCISE 3 



WASHING THE SEPARATOR 



Object: To determine the effect upon the efficiency of 

 the hand separator from not washing the bowl each time 

 after using. 



Apparatus: Separator, milk, containers, scale, sample 

 bottles, thermometer, and testing outfit. 



Steps : 1. Assemble the separator ready for use, temper 

 the milk to 85 F., and weigh out two lots of a definite amount 

 each. It is a good plan to try this exercise with several dif- 

 ferent separators, as the comparative results will be of much 

 more value. 



2. Separate lot No. 1 in a machine which has been left 

 over night unwashed. Determine the weight of the cream 

 and of the skimmilk and retain samples of each to test. 



3. Wash the separator parts thoroughly ; then reassemble 

 and skim lot No. 2. Determine the weight of the cream and 

 of the skimmilk and retain samples of each to test.. 



4. Test all of the samples, make the computations, and 

 record the data. 



Data: 



