THE TESTING OF SAMPLES. 



1. Each sample must be tested in duplicate by the Babcock test ; 

 the separation must be clean (free from curd and charred material); 

 and no variations in excess of o.io per cent, shall be allowed. 



2. In a seven day test when any of the milk or a test sample is 

 accidentally lost, the average of the corresponding milkings during 

 the other six days shall be substituted for the missing weight or test, 

 but such results must always be reported as estimations. 



3. With all tests of a week or more duration, a seven day com- 

 posite sample shall be taken, when required, by means of a sampling 

 pipette (i c. c. for every pound), preserved with bichromate of pot- 

 ash or some other preservative and forwarded in a full bottle to the 

 station by prepaid express. Accompanying the sample shall be a 

 statement of the total amount of milk and of fat produced during the 

 seven days represented by the composite. Results by the station's 

 test and by the inspector's data ought not to vary more than 0.15 per 

 cent. 



ADDITIONAL RULES WITH THE CHURN TEST.* 



1. In case the churn test is employed in addition to the Babcock, 

 milk samples of the same amount must always be taken so that the 

 loss of fat in the samples can readily be calculated from the total 

 weight of the samples and the average percentage of fat. 



2. The skim milk should be weighed daily, carefully mixed and 

 a composite taken by means of a sampling pipette. 



3. The butter milk should be weighed, sampled, and if more than 

 one churning, a composite taken by m'eans of a sampling pipette. 



4. The skim milk and butter milk should be tested in duplicate 

 by the Babcock test and no variation in excess of 0.02 per cent 

 allowed. 



5. The finished butter should be weighed and sampled immedi- 

 ately by slicing the entire lump (not prints) by means of a thin case 

 knife or spatula, and by taking small pieces (size of a walnut) from 

 various parts of the different slices. Great care should be exercised 

 to prevent loss of water. The sample, amounting to about one-half 

 a pound, should be shipped to the station in a sealed Lightning fruit 

 jar by prepaid express. 



•Confirmed Butter Test. A. J.C. C. 



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