ADVANCED REGISTRY RULES 347 



6. Fat determinations are always made in duplicate, and the average 

 of the two determinations recorded on the record sheet. The sample 

 taken of any one milking is not to be thrown away until a perfectly 

 satisfactory test of the milking has been obtained. On completion of 

 each test, the Station representative will at once indelibly enter in his 

 note-book the results obtained. In making entries of fat, the super- 

 visor shall use three decimal places. If the figure in the fourth place 

 be a 5, or greater than 5, he shall count it as one of the next higher 

 order ; but if it be less than a 5, he shall drop it. 



7. If any of the milk or the test sample from a milking be acciden- 

 tally lost, the missing weight of the milk or fat credited to this milking 

 is to be obtained by taking the average of all corresponding milkings 

 during the whole test; that is, if e.g., the evening milk is lost, or the 

 test sample therefrom, the average of the weights of milk and of fat 

 of all evening milkings during the test is taken as the yield of milk 

 and fat for the milking lost. It must be stated on the report that 

 data so obtained are estimated and not actual. 



8. Composite-Test Sample. At the time the test of the milk is 

 made, a sample, comprising as many cubic centimeters of milk as the 

 number of pounds in the milking, is placed in a pint fruit jar, con- 

 taining a small quantity of preservative, for the composite-test sample 

 to be sent to the Station when the test is completed. A 25 c.c. glass 

 pipette for taking this sample is furnished in each outfit. 



Each and every milking must contribute to the composite-test 

 sample in proportion to the amount of milk yielded each time, which 

 will be accomplished by strictly following the directions. The Station 

 representative will be responsible for the proper care of the composite 

 sample, and will send it to the Station by express immediately on the 

 completion of the test. 



9. In selecting official test periods of not less than seven consecu- 

 tive days for report, the test periods so selected may begin with any 

 milking made at the regular hour for that milking ; provided the pre- 

 vious milking, as well as the last milking of the test period selected, 

 are also made at the regular hour. When any official test period forms 

 a portion of any semi-official test, a detailed report of the whole official 

 test period must be made ; but the Superintendent of Advanced Regis- 

 try will only report as A. R. O. record, or records, such consecutive 

 portion, or portions, of the test as the owner may select. 



