FOOD EFFECT ON MILK SECRETION. 215 



per hundred pounds over corn meal. Eight cows were used in a 60 day 

 experiment to determine these points. 1 



OILS. Cottonseed oil, corn oil, palm oil, cocoanut oil, oleo oil, stearin 

 oil. These were fed to three cows for the period of fifteen days a period 

 too short from which to be able to draw positive conclusions. The au- 

 thor's deductions were: 



1st. That the first effect of an increase in fat in a cow's ration is to 

 increase the per cent, of fat in the milk. 



2nd. That with the continuance of the ration the tendency is for the 

 milk to return to its normal condition. 



3rd. That the increase in fat is not due to the oils but to the unnatural 

 character of the ration. 



4th That the results in this experiment tend to confirm the conclu- 

 sion expressed in previous bulletins from this station, that the composition 

 of cow's milk is determined by the individuality of the cow, and that al- 

 though an unusual food may divert for a time the composition of the milk 

 its effect is not continuous. 



COTTONSEED OIL produced the hardest butter, and corn oil the 

 softest. 2 



TALLOW. Tallow was fed to ten different cows for a period of ten weeks: 

 during six weeks each cow ate on an average of two pounds of tallow per 

 day. No increase in milk fat followed. 3 



MILK. Feeding whole milk to two cows on pasture had the effect of 

 keeping up the flow and the per cent, of fat. Skim milk did not do as 

 well as whole milk, but showed some increase over no milk. 4 



CORN FODDER AND BEAN VINES. G. H. Whitcher found that by the 

 feeding of a herd, six pounds of corn fodder to each daily, that he received 

 217.54 pounds of milk, or an increase of 5.54 pounds daily over the same 

 period during which five pounds of bean vines were being fed. He also 

 substituted six pounds of millet for six pounds of corn fodder, and found 

 an increase of . 35 of a pound, an amount so small that it does not mean any- 

 thing one way or the other. 



CORN FODDER AND CORN SILAGE have the same value. 5 At the Missouri 

 Station the fodder fed cattle gave milk richer in fats and in solids. 6 



CORN STOVER AND HAY are of equal value. 7 Corn fodder has essentially 



1 Bulletin 14, Iowa Experiment Station. 



2 Bulletin 18, New Hampshire Experiment Station, A. H. Wood. 



3 Bulletin 92, Cornell University Experiment Station, H. H. Wing. 



4 Bulletin 17, Iowa Experiment Station, James Wilson and G. E. 



Patrick. 



5 Bulletin 105, New York Agr. Experiment Station, Van Slyke. 



6 Bulletin 8, Missouri Agr. Experiment Station. J. W. Sanborn. 



7 Report Vermont Agricultural Experiment Station, 1889, J. L. Hills. 



