314 Butter Record oe the Buckhold Herd. 



of butter in the year, and that only one of those that have been in 

 the herd for the whole year has made less 'than 300 lb. of butter. 



This record B is made in the following way : — In the middle 

 of each month (see the specimen sheet for December, 1901, 

 on p. 317), the milk of every cow is weighed at two milkings (on 

 one night and on the succeeding morning; ; these two weights 

 added together give the amount in column I. Further, at 

 each of these two milkings a sample of each cow's milk is 

 taken in the proportion of 1 drachm for every 1 lb. of 

 milk ; the samples of the night and of the morning's milk of 

 each cow are mixed together, this mixed sample is warmed 

 and tested by Gerber's butyrometer, and thus the average 

 proportion of butter-fat in the milk of each cow for the two 

 milkings is ascertained (column II.). As the weight of 

 the milk and the proportion of butter-fat for each cow is 

 known, the amount of butter which each cow has given during 

 the twenty-four hours can be recorded (column III.). The 

 total of column III. gives the amount of butter made by the herd 

 during that time. This total is checked thus : The milk of the 

 two milkings is passed through a cream separator (except 

 certain measured amounts which are sent to the house or used 

 at the farm), the cream is churned, and the butter recorded 

 (d)> and further, by the Gerber test, the amount of butter 

 contained in the measured milk and cream not churned and sent 

 to the house is found (e). These two items, (d) and {e) y 

 should make a total equal to the total of column III. 



This column III. would be sufficiently correct as an average 

 daily record for the month if all the cows were giving milk all 

 the month, but as some of them may be dry part of the time or 

 may be leaving or entering the herd, another column (IV.) is 

 given to meet such cases, due allowance being made in it for the 

 time each of the animals is in milk during the month ; therefore 

 column IV. gives the average daily record of each animal for the 

 month. 



Columns I. to XII. (pp. 318, 319) give in exactly the same 

 way each cow's average daily record for each of the twelve 

 months, and if these items are added horizontally column XIII. 

 gives the additions of these twelve columns. The amounts so 

 obtained, if multiplied by thirty (the approximate number of 



