570 



even though the quantities of food in the latter were larger and the 

 milk \ras nearly unchanged in amount and comi)Osition throughout 

 when allowance was made for the natnial changes in composition of 

 milk with advance of the period of lactation. The same experiment 

 was made with six cows in series F, with the diliercnce, however, that 

 the cows were heavier. The result wa« the same. It was repeated 

 with seven cows in series G. The cows were of the same weiglit as those 

 of series E. The results were opi><>site — loss of weight witli the wider 

 rations and gain of weight and increase of milk production with the nar- 

 rower rations. The most [daiisible explanation of this difl'erenceis that 

 the cows were not in as good tiesh in the last series as in the two pre- 

 vious ones. 



In these experiments with milch cows two points of special interest 

 are brought out : 



(1) On the whole, more liberal rations, and especially rations richer 

 in protein than the accej>ted feeding standard^' call for, were the most 

 advantagcons. Farmers and dairymen in the rnite<l States are apt to 

 Iced smalh-r quantities of protein and of total nutrients than such 

 standards provide. Tlic inference is that more liberal feeding and espe- 

 cially more protein will be advantageous. 



(2) The results of the different series did not entirely agree with one 

 another; although a consid«'rable number of cows were used in ea<h 

 instance, the inference is that to make such experiment* decisive they 

 must be repeated a number of times. 



EXPERIMENTS WITH FATTENFNG OXEN AND STEERS. 



Of these, throe scries were made, two with diffnsion residue and one 

 witli nitrogenous feeiling stuffs (narrow rations), the corresponding 

 series with wide rations not haAiog been carried out. In each series 

 either fifteen or nine animals were divided into three equal lots. During 

 the feeding period, which continued from 7.'^ to 104 days, the tliree lots of 

 each series received the same basal ration. 



Effects of icafery foods in (Viffiient qunntitks. — The experiments were 

 nmde in two series, designated H and I. The basal ration in each 

 consisted of hay, straw, wheat bran, cotton-seed meal, and corn meal. 



Series H. — Urct diffuMon residue added in different quantities to hasal 

 ration. — Conducted by Ilerr AValther Wiesberk in Wegeleben. I'if- 

 teenoxen averaging l.r»S4 ]M»unds live weight, divided into three lots of 

 five animals eaeli. IJasal ration per head per day in pounds, hay 5.5, 

 straw ad libitum (average consumption 5.5), wheat bran 1'.2, and cotton- 

 seed meal and corn meal in (pmntities sutlieient to make the ilesirtnl 

 quantities of nutrient when the beet diffusion residue was a<lded; beet 

 diffusion residue in qmmtities as stated. Duration of experiment from 

 January 31 to :May 10— lol days. 



