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DAIRY LABORATORY GUIDE 



EXERCISE 5 



SPEED OF THE SEPARATOR 



Object: To determine the effects of variation in speed 

 upon the efficiency of the hand separator. 



Apparatus: Separator, milk, containers, sample bottles, 

 scale, thermometer, and testing outfit. 



Steps: 1. Assemble the separator, temper the milk to 

 85 F., and weigh out three lots of a definite amount each. 



2. Separate lot No. 1 at proper speed, which is usually 

 indicated on the handle of the machine. Determine the 

 weight of the cream and of the skimmilk and retain samples 

 of each to test. 



3. Separate lot No. 2 at five revolutions of the handle 

 below proper speed. Determine the weight of the cream and 

 of the skimmilk and retain samples to test. 



4. Separate lot No. 3 at five revolutions of the handle 

 above proper speed. Determine the weight of the cream and 

 of the skimmilk and retain samples to test. 



5. In case the speed of the machine is not indicated on 

 the handle, refer to the book of instructions usually accom- 

 panying the machines. Exceeding care is necessary to avoid 

 accidents. 



Data: 



