54 Bulletin 152. 



each of the records is given a number, which number appears in 

 the column to the left of the cow's name under head of 

 " Number of Test." These numbers begin with the first two- 

 year old test and run consecutiveh^ through the various ages of 

 the animals. The two-3'ear olds include numbers i to 74, three- 

 year olds 75 to 112, four-year olds 113 to 147 and full aged cows 

 148 to 210. Thus of the 210 separate tests, 74 are of two-year 

 olds, 38 of three-year olds, 35 of four-year olds, and 63 of full 

 aged cows. According to this system, each cow will have as 

 man\^ different numbers as she has different tests ; for exam- 

 ple, numbers 37, 88 and 146 all refer to Clothilde Artis Tops}^ but 

 to tests conducted at different times in her life. All those heifers 

 which calved between the ages of two years ten and one-half 

 months and three years are considered as three-year olds ; for it 

 is presumed that at such age the}' must have had their second 

 calves, and should not, therefore, be classed as two-year olds. In 

 similar manner and for the same reason the heifers that calved 

 between the ages of three years ten and one-half months and 

 four years are considered as four-year olds. 



