ELEVENTH ANNUAL YEAR BOOK— PART XI 



635 



as to end exactly in the middle of the time between two testing days. 

 Observance of this rule is very important, as it materially affects the 

 accuracy of the work. The number of days in the testing period is 

 understood to include both the dates mentioned as beginning and end 

 of the period; thus, if the testing period begins March 15 and ends April 

 14, there will bo thirty-one days in the testing period. The yields of 

 milk and butterfat for the testing period are founds by multiplying 

 the yield on the testing day by the number of days in the period. The 

 daily yield of milk is recorded in tenths and the monthly yield in whole 

 pounds, while the yield of butterfat" is recorded in tenths of a pound. 

 If 12 tests are made in the year, 12 testing periods will result, and the 

 sum of the records thus obtained will furnish a total summary of the 

 various items for one year. 



It is always advisable that the dairyman should make daily weighings 

 of each cow's milk. By doing this he will discover at once any sudden 

 fluctuation in the milk yield, and may in many cases be able to locate 

 and remedy the cause. He should also note when each cow goes dry, 

 when she is bred, the date of calving, and any changes in feed during 

 the testing period, so that he may be able to give the cow tester this 

 information when he arrives. 



A MICHIGAN ASS1H IATION's RECORD FOR THE FIRST FOUR YEARS. 



The Newaygo County Dairy Testing Association, the first cow-testing 

 association organized in the United States, has now been in operation 

 for more than four years, and four whole years' records have been 

 obtained. At the end of the first year a number of members withdrew 

 from the association, but new members were readily found, and the 

 association is now able to get more members than it can take care of. 

 The summaries for the first four years of the association's existence are 

 given in the following table: 



YEARLY AVERAGES PER COW OF XEWAYGO COUNTY (MICH.) DAIRY TESTING 



ASSOCIATION. 



