850 



THE VARIABILITY OF COWS MILK, 1., 



Tt will be seen from the above diagram that only a small pro- 

 portion of the samples examined contained percentages of fat 

 below the legal standard of the State in which they were obtained. 



The frequency curve shows that the most probable percentage 

 of fat in these samples of milk is 4-65. It must be borne in 

 mind, however, that the samples are of the afternoon-milk, which 

 is richer in fat than the milk obtained in the morning. 



In the next diagram (Text-fig. 3), the ogive and the frequency 

 curve of the percentages of solids not fat are given. As before, 

 the abscissae represent the percentage-values of the quantity 

 measured, and the ordinates, the numbers of results at and below 

 these values. The ordinates again refer only to the ogive. The 

 heavy line at 8 '5% indicates the position of the standard per- 

 centage of solids not fat. 



Text-fig 8, 

 Ogive and frequencj'^ curve of concentrations of solids not fat in cows' 

 milk Abscissae: percentages of solids not fat. Ordinates: numbers 

 of results; ordinates refer only to ogive, 



The above diagram shows that over 40% of the samples ex- 

 amined contain a percentage of solids not fat below the legal 



