DAIEY FARMINC 



-DAIRYING. 



487 



oil was emulsified, in a machine constructed for this special purpose. 

 The fat globules of the emulsion had an average diameter of about 

 (►.0011 mm. and did not separate out on being kept in a closed vessel 

 for 10 months. The oil emulsion was given as a drink in water during 

 7-day periods, the quantities of oil fed during the different periods 

 ranging from 250 to 750 gm. per day. The rations fed were normal 

 mixed rations, with a nutritive ratio of about 1 : 5.7. No changes were 

 made in the feed during the different experiments. Experiments 1 

 (lasting from December 13 to January Hi) and 2 (lasting from February 

 5 to 25) were made with a cow of Stromsholm breed, and experiment 3 

 (lasting from March 22 to April 11) with a crossbred Ayrshire cow. 

 The main results of the experiments are shown in the table given below: 



Results of feeding oil emulsions to milch cows. 



The results of the experiments are, briefly stated, that the fat con- 

 tent of the milk was increased at first by feeding large quantities of oil 

 in the form of an emulsion, but later on no increase took place; the 

 milk, on the contrary, dropped to its previous normal fat content, 

 depending on the individuality of the cow. — f. w. woll. 



Feeding skim milk according to the Trystorp method, P. Hans- 

 son {Meddel. K. Landtbr. Styr., 1897, No. 12, pp. 150-155). — In feeding 

 skim milk to cows by this method, it is curdled and straw chaff added 

 to the curdled mass (E. S. E., 8, p. 248; 10, p. 382). Instead of adding 

 75 per cent of chaff, as recommended by the originator of the practice, 

 the author used only 25 per cent. As the result of a feeding experi- 

 ment with 20 cows, separated into 2 even lots of 13 each, the value 

 of the skim milk was found to be somewhat less than indicated by 

 its content of nutrients, viz, 13 cts. per 100 lbs., against $1.18 per 100 

 "food units" of the mixed ration fed. In place of 1.4 lbs. of grain 8.8 

 lbs. of skim milk was introduced in the ration. The cows did not keep 

 up as well in milk yield or in live weight on the skim-milk ration as 

 they did on the mixed-grain feed. — F. w. woll. 



Skim-milk feed for milch cows, L. F. Nilson (K. Landt. Akad. 

 HandL, 37 (1898), No. 2, pp. 115-122).— A feeding experiment was made 

 with 30 cows to test the merits of the Lindstrom method of feeding 



