ILLINOIS DAIRYMEN'S ASSOCIATION. 



203 



lated amount needed for body maintenance, instead of .081, the amount 

 supposed to be needed according to the Wolff-Lehmann standard. 



In examining the individual record of the cows listed in the table, it 

 will be seen that they varied greatly in amount of protein consumed daily 

 and milk and butter fat produced, and that there was also a marked 

 variation between the cows in the amount of protein consumed to milk 

 produced. By singling out the mature cows in the group that made little 

 if any gain in weight, and calculating the amount of protein needed daily 

 for maintenance, using the same factor employed by Dr. Lehmann, and de- 

 termining the amount left available for product gives the following table: 



Table X. — Giving Weight of Cows, Protein Eaten, Amount Available for 



Milk Production, Yield of Milk, Per Cent Fat and Protein to One 



Pound of Milk. 



NAME 



Weight 



Protein 

 Daily 



Protein 



for 

 Mainte- 

 nance 



Protein 



for 

 Product 



Yield 



of 

 Milk 



Per 



Cent 

 Fat 



Pro- 

 tein 

 tol lb. 

 Milk 



Lbs. Lbs. Lbs. Lbs. Lbs. 



Tricksey 750 1.51 .52 .99 16.02 



Houston 908 2.13 .63 1.50 25.99 



Sweet B 1060 2.22 .74 1.48 25.80 



Olive 790 1.69 .56 1.13 21.66 



Topsy 1150 2.60 .80 1.80 40.04 



Lydia 1086 2.23 .76 1.47 27.90 



Quidee 890 1.87 .78 1.25 27.05 



Lou 1110 2.20 .62 1.42 33.58 



Countess 1177 2.36 .82 1.54 43.55 



Average 991 2.09 .69 1.40 29.06 



5.4 

 5.3 

 5.3 

 4.2 

 3.8 

 3.6 

 3.5 

 3.5 

 2.5 



Lbs. 

 .061 

 .057 

 .057 

 .052 

 .045 

 .052 

 .046 

 .042 

 .035 



3.9 



.048 



The cow Tricksey yielded 16.02 pounds of milk daily on only 1.51 

 pounds of protein, while the Wolff-Lehmann standard prescribes 2 pounds 

 as the amount needed when giving 16.50 daily; Houston gave 25.99 pounds 

 of milk daily and had only 2.13 pounds of protein, while the standard 

 referred to gives 2.5 as the amount needed by a cow yielding 22 pounds of 

 milk, and the cow Topsy gave 40 pounds of what may be considered milk 

 of average quality, with a ration containing 2.6 pounds of protein, while 

 the standard prescribes 3.3 for a cow giving 27.5 pounds. The record 



