62 



MANUAL OF MILK PRODUCTS 



Percentage of Butter-fat in the Milk of the Seven Cows at 



the University 



Name of Cow 



Average Per 



Cent of Fat 



in Milk 



1st and 4th 



Periods Scant 



Ration 



Average Per 

 Cent of Fat 

 in Milk 

 2d and 3d 

 Periods Lib- 

 eral Ration 



Gain while under Liberal 

 Feed 





Actual 



Per Cent 



Dena 



Patty 



PoUy 



Rena 



Rita 



Stella .... 

 Tilda 



4.91 

 4.26 

 5.95 

 3.55 

 3.91 

 5.01 

 3.56 



5.24 

 4.67 

 6.08 

 3.76 

 4.25 

 5.11 

 3.79 



.33 

 .41 

 .13 

 .21 

 .34 

 .10 

 .23 



6.7 



9.6 



2.2 



5.9 



8.7 



2. 



6.5 



Average gain . . 







.25 



5.9 



" There are, moreover, several features of interest in the first 

 table that will repay further study. 



" In general it will be seen that the increase in fat was much 

 the most marked in the second period. In the third period 

 there was a marked reduction and in the fourth period most of 

 the cows gave poorer milk than in the first." 



From the results of this work Wing draws the following con- 

 clusions : 



" In a herd of poorly fed cows an abundant ration easily diges- 

 tible and rather nitrogenous in character and continued through 

 two years, resulted in an average increase of one-fourth of one 

 per cent of fat in the milk (or a percentage increase of about 

 6 per cent). 



" This was accompanied by an increase of about 50 per cent 

 in total amount of milk and fat produced." 

 Influence of fatness of cow on percentage of fat in milk. 



Eckles 1 has studied the condition of the cow as measured by 

 the amount of fat stored in her body at the time of parturition, in 



1 Missouri Bui. 100. 



