MAKUAL OF OATTLE-FEEDIKG. 



421 



Ex;peThnents ly Wolff, — Some experiments by Wolff,* 

 in 1868j thongli imperfect in some particulars, illustrate 

 the influence of the protein of the fodder on the quantity 

 of the milk- 

 In the first and last periods the fodder was the same, 

 and from the difference in the yield of milk it was calcu- 

 lated that the average decrease per day due to the progress 

 of lactation was 0.0284: lb. The amount of non-nitroge- 

 nous matter in the fodder was practically the same in all the 

 periods, only that of the protein being yaried. The fol- 

 lowing table shows the amount of crude protein fed per 

 day, the yield of milk per day, its percentage of dry mat- 

 ter, the yield of milk reduced to a uniform water-content 

 of 88 per cent., and the amount which would liave been 

 yielded had the fodder remanied the same as in the first 

 and last periods : 











Milk -with S8 peu cent. 



Period. 



Grndc 

 pi otem 



fed. 



Lbs. 



Yield 

 of 



nnlk. 

 Lbs. 



Dry 



matter of 



milk. 

 Per cent. 



Watkb. 



Tonnd. 

 Lbs. 



Calculated. 



Lbs. 



1 



3.53 

 3.18 

 3.8G 

 4.17 

 3.34 



19.8 

 19.9 

 30.0 

 19.7 

 18.5 



11.38 

 11.43 

 11.46 

 U 61 



11. 7r 



18.8 

 18,9 

 19.1 

 18.9 

 18.0 



18.8 



3 



18.5 



3 



18.3 



4 



18.0 



5. 



17.8 



6. 



3.73 



18.3 



• • • • 



• • • # 



• » • ♦ 



7 



4.15 



18.3 



11.50 



17.5 



17.4 



8 



4.50 



18.3 



11.88 



17.9 



17.1 



9 



3.95 



17.1 



11.84 



16.8 



16 8 



- ■ ' \ 



* "Einahruug Landw. NuUtbiere," p. 503. 



