636 



TESTING BUTTER 



cent of 9 grams is 8.1 grams. Since the specific gravity of butterfat, 

 under test conditions, averages approximately .9, the 8.1 grams of 



8 1 



butterfat occupy a space of -5- or 9 cc. The volume of the neck, 



from to 90, therefore, must occupy exactly 9 cc. This volume 

 calls for a test bottle of the following dimensions : Height over all, 

 approximately 8.8 inches. Length of graduated portion of neck, 





Tig. 105 



Pig-. 106 



Hepburn Butter Test Bottles 

 Courtesy Louis F. Nans 



139 mm. Diameter of graduated portion of neck, 9.07 mm. The 

 graduated portion of neck is divided into 90 divisions. This bottle 

 is applicable for a Babcock centrifuge with a wheel diameter of 18 

 inches or more. 



