COMPOSITION OF MILK 



445 



Variation in average composition of 574 samples of market butter samples 

 collected each month for a period of one year (Illinois Experiment 

 Station) . 



Month Collected 



March }, 



April 



May 



June 



July . 



August . 



September 



October 



November 



December 



January 



February 



Average 



Number 



Samples 



each 



Month 



47 

 49 

 49 

 49 

 40 

 37 

 54 

 49 

 50 

 41 

 53 

 56 



Water 



13.59 

 12.94 

 13.48 

 13.23 

 13.92 

 13.64 

 13.31 

 14.05 

 13.31 

 13.35 

 14.16 

 13.54 

 13.54 



Percent 



Fat 



82.73 

 83.34 



82.97 

 83.58 

 82.83 

 83.57 

 83.64 

 82.73 

 83.53 

 83.56 

 82.59 

 83.29 

 83.20 



Salt 



Casein and 

 Ash 



0.74 

 0.85 

 0.82 

 0.94 

 0.99 

 1.04 

 0.90 



Nutrients and energy in 1 pound of the water-free edible portion of 

 several food materials in comparison with milk (United States Depart- 

 ment of Agriculture) . 



