A STUDY OF RATIONS FED TO MILCH COWS. ai 
fiber) fed each day were calculated. By the use of digestion 
coefficients, estimates were made of the weights of digestible 
nutrients in each day’s ration.* 
RESULTS OF EXPERIMENTS DURING THE WINTER OF 1896-97. 
Tables 1 to 8 inclusive contain the results of the observa- 
tions and studies of the different herds. 
The following abbreviations are used in the tables: 
i>, Grade. P.=Pure-bred. Gy.=Guernsey. 
R.= Registered. if ye=ed EFSey; Hol. = Holstein. 
Hach of the following tables gives the condensed results of 
a single test. The tables are alike in arrangement, except in a 
few cases in which there were irregularities in the feeding, and 
to which attention is called in the proper place. An explana- 
. tion of one therefore will do for all. 
Each table is in two parts. ‘The upper part gives the statis- 
tics of the herd, the average daily milk flow, the percentage of 
fat in each day’s milk, and the yields of butter-fat, for each 
cow used in the test. This portion of the table follows the 
same plan in all cases, and requires no explanation. 
The lower part of each table gives the kinds and amounts 
of the different feeding stuffs eaten per day, and the weights of 
the digestible nutrients (protein, fat, and carbohydrates) which 
they were estimated to furnish. The weights of foods and 
nutrients are calculated per 1,000 pounds live weight and also 
‘per average weight’’ of each herd. ‘The figures for average 
weight, which are given at the right of the table, represent 
the average amount actually fed per animal per day. 
All of the feeding stuffs used in these rations were analyzed. 
The analyses are given in the article on Analyses of Fodders 
and Feeding Stuffs beyond. From the weights of the different 
feeding stuffs, the results of the analyses, and the digestion 
coefficients given in the following table, the weights of digesti- 
ble nutrients were calculated in the usual way. ‘he fuel values 
of the different foods were obtained by multiplying the number 
' of pounds of digestible protein and carbohydrates by 1860, and 
the number of pounds of digestible fat by 4220, and taking the 
sum of these products as the number of calories of energy in 
the materials available for the use of the animal. 
* For explanations of technical terms, see article on Nitrogenous Feeding Stuffs 
beyond. 
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