32 IvKrouT OF Dei'aktmen't op Animal Husbandry of the 



A record of the amount and composition of tlie food, milk and 

 excreta was kept for 74 days. 



(2) Cow 10, a grade Jersey weighing about 750 pounds, fresh 

 in milk at first and not pregnant, was fed a mixture of normal 

 feeding stuffs for G8 days, the fat in which was varied from a 

 proportion fully as large as is ever found in practice to a quan- 

 tity somewhat excessive, the daily supply of digestible matter 

 remaining quite constant. A record of the amount and com- 

 position of the food, milk and excreta was kept for 54 days. 



(3) Cow 2, a full blood Jersey, of very large productive 

 capacity and in full milk flow, weighing about 780 pounds, was 

 fed the usual herd ration. The amount of food was accurately 

 weighed for 20 days and the milk and excreta were weighed and 

 analyzed for the last four. 



THE FOODS. 



The feeding stuffs used in these experiments, some of them 

 normal and some having been submitted to a petroleum extrac- 

 tion, had the following composition: 



Composition of Feeding Stuffs. 



Fat 

 Lab. Water. Ash. Nitro- Pro- (Pt-trolcum 



No. gen. telu.*. extract.) 



Per ct. Per ct. Per ct. Per ct. Per ct. 



712 Mixed hay, Cow 10 14.5 6. 30 1.G2 10.12 1.30 



717 Alfalfa hay, Cows 2 and 12. . 10. GO 0.92 2.39 14.94 1.44 

 710 Oat straw, Cow 12 10.75 5.27 0.33 2.00 1.44 



713 Corn meal, Cow 10 22.12 1.28 1.24 7.75 2.27 



730 Corn meal, Cow 10 20.20 1.55 1.35 8.44 1.57 



720 Corn meal, extracted, Cow 12 12.30 1.10 1.50 9.73 0.37 



740 Corn meal, extracted, Cow 12 11.05 1.14 1.53 9.50 0.37 



718 Rice meal. Cow 12 12.07 0.31 1.53 9.18 0.11 



719 Rice meal, Cow 12 11.87 0.34 1.53 9.18 0.09 



727 Rice meal, Cow 12 13.45 0.00 1.13 0.78 0.:U 



741 Rice meal, Cow 12 12.79 0.38 1.50 9.O0 O.os 



721 Oats, extracted, CoAv 12 11.18 3.00 2.20 13.20 0.79 



739 Oats, extracted, Cow 12 12.07 2.98 2. 12. 0.71 



745 Wheat bran. Cow 2 11.21 1.29 2.44 13.91 4.33 



740 INIalt sprouts. Cow^ 2 10.40 5.38 4.22 25.-32 1.07 



714 Linseed meal, Cow 10 7.05 4.75 5.9(i 32.78 0.71 



737 Linseed meal. Cow 10 9.48 4.78 5. 84 .32.12 7.07 



747 Linseed meal. Cow 2 9.52 4.04 5.85 .32.17 0.94 



715 Flaxseed, ground, Cow 10. . . 9.75 2.91 3.34 18.37 37.2!) 

 7.38 Flaxseed, ivround. Cow 10... 4.04 3.00 3.42 18.81 38. S4 



722 Wheat gluten, Cow 12 7.10 0.33 13.08 75. .54 0.71 



723 Wheat gluten. Cow 12 9.10 0.43 12.04 71.01 o..-)3 



742 Wheat gluten, Cow 12 6.38 0.72 12.80 72.90 0.94 



Sugar beetst 



♦With hay, oat straw and corn imvil, profcin = N x (! 25 ; with r:ce moal, oats atul malt spmiits, 

 protein = N xfi; with wheat, I>ran amt wheat gluten, protein = N x 5.7 ; with linseed meal and 

 grounil flaxseed, protein - .'^ x 5.5. 



t n.iily analyses of sii^ar beets were nndo. 



