86 



EXPERIMENT STATION RECORD. 



effect on the live weight appeared to be unfavorable. The advantages 

 of well-lighted stables are considered apparent. 



On the influence of the food on the fat content of the milk, F. 

 Friis (Mdlheritid., 1897, Oct.; Norsk Lcmdmansblad, 16 (1897), No. 45, 



pp. 198-501; Biet, 18, {1897), pp. 238-217).— The author reviews the 

 cooperative cow feeding experiments conducted at the State experiment 

 station at Copenhagen since 1888, with special reference to the effect of 

 food on the fat content of the milk (E. S. li., 9, p. 490, and previous 

 volumes). The following summary of 76 series of experiments is repro- 

 duced from the paper : 



Summary of Danish feeding experiments with cows on the effect of food on quality of milk. 



Year. 



Num- 

 ber of 



series 



in- 

 cluded. 



Basal ration. 



Additional rations in experi- 

 mental period. 



Fat in milk. 



Pre- 

 para- 

 tory 

 period. 



Ex Post- 

 peri- experi- 

 mental mental 

 period, period. 



1888 -K9 



1896 



40 lbs. > roots, 7 lbs. 

 bay, straw ad libi- 

 tum. 



3.6 His. mixed grain, 

 2.8 lbs. bran, 3.2 lbs. 

 oil cakes, 5.8 lbs. 

 bay, straw ad libi- 

 tum. 



7.G lbs. bay, straw ad 

 libitum. 



34 lbs. roots, 7.3 lbs. 

 > hay, straw ad libi- 

 tum. 



2 lbs. oil cakes, 28.6 

 lbs. roots, 6.3 lbs 

 hay, straw ad libi 



tu in. 

 1.7 His. oil cakes, 3 lbs. 

 bran, 27 lbs. roots, 

 9.3 lbs. hay, straw 

 ml libitum.' 



3 lbs. oil cakes, 3(1 lbs. 

 roots, K.4 Lbs. hay, 

 straw ad libitum. 



(U lbs. concentrated feed. . 

 Basal ration 



10.^ lbs. concentrated feed. 



No roots 



Ter ct. 

 3.14 



Per ct. 

 3.13 



3. 1C 

 3.20 



3.19 

 3.22 



36 lbs. roots 



10i lbs. concentrated Iced ... 

 8£~lbs. concentrated feed, 20 



His. routs, 

 til lbs. concentrated Iced. 40 



lbs. roots. 

 5.4 lbs. mixed grain, 1 .8 lbs. 



oil cakes. 

 3.6 lbs. mixed grain, 3.6 lbs. 



oil cakes. 

 1.8 lbs. mixed grain. 5.4 lbs. 



oil cakes. 



fi lbs. mixed grain 



3 lbs. mixed grain, 3 lbs. 



bran. 



His bran 



5.2 lbs. mixed grain 



2.6 lbs. mixed grain, 2.6 lbs. 



wheat. 



5.2 lbs. wheat 



3i lbs. mixed grain 



]'l lbs. mixed grain, 1J lbs. 



molasses feed. 

 3 J lbs. molasses feed 



3.20 



3.21 

 3. 16 



3.16 



:i. 22 



3. 20 



3.23 



3.09 

 3.10 



3.10 



3.08 

 3. 1 1 



3.11 

 3. 25 



3.23 



3. 20 



3.22 

 3.17 



3. I.'. 



3.20 



3. 17 



3.20 



3.04 

 3.11 



3.12 

 3.09 

 3.10 



-.',. 12 

 3.16 

 3.12 



Per ct. 

 3.33 



3.37 



3.23 



3.28 

 3.30 



3.33 



3.32 



3.31 



3.51 



3.26 

 3.29 



3. 29 

 3. 24 

 3.25 



3. 2:1 

 3.27 

 3.21 



' Amounts are. stated in Danish pounds, 1.1 lbs. avoirdupois. 



In the opinion of the writer the experiments prove that "the feed 

 under practical conditions, as found in this country, exerts an entirely 

 insignificant (forsvindende) influence on the fat content of the milk." 

 It is noted that although the differences in the rations fed to the different 

 lots were considerable the rations may all be regarded as normal for 

 milch cows, such as met with in the feeding practice on Danish dairy 

 farms. The question whether abnormal feed mixtures can appreciably 

 change the fat content of milk was not included in the investigations 

 of the station. Only the effect of the food on the percentage of fat in 

 the milk is considered in this paper. The author notes that the experi- 



