DEPARTMENT OF AGRICULTURE: 



7. Place the bottles in the machine, making sure that they are properly balanced, 

 and whirl for five minutes at proper speed (700 to 1,200 revolutions per minute, 

 according to the diameter of the machine). 



8. Add hot water at a temperature not lower than 140 Fahr., filling the bottle 

 just to the neck. 



9. Whirl two minutes. 



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115 



c c 



Fig. 1. 



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(2. 



(3. 



Fig. 2. 



F, 1 . 1 ? 61 * 6 for measuring milk. 

 Milk-test bottle. 

 Acid measure. 



Fig. 3. 



