292 



Journal of Agricultural Research voi. xvii. No. 6 



TablB I. — Frequency distributions for variation in average weekly milk yield of Ayrshire 

 cowsof different ages — Continued 



Yield (in 

 gallons). 



7.00. . 

 ISO- . 

 8.00. . 

 9.00. . 

 10.00. 

 11.00. 

 11.50. 

 12.00. 

 12.50. 

 13.00. 

 13.50. 

 14.00. 

 14.50. 

 15.00. 

 15.50. 

 16.00. 

 16.50. 

 17.00. 

 17.50. 

 18.00. 

 18.50. 

 19.00. 

 19.50. 

 20.00. 

 20.50. 

 21.00. 

 21.50. 

 22.00. 

 22.50. 

 23.00. 

 23.50. 

 24.00. 

 24.50. 

 25.00. 

 2550. 

 26.00. 

 26.50. 

 37.00. 

 38.00. 

 39.00. 



Total. 



10-year-old cows. 



1908. 



Fre- 

 quen- 

 cy. 



Per- 

 cent- 

 age. 



2.38 



1-59 

 3-97 

 3- 17 



• 79 

 3-97 

 9- 53 

 7-94 

 7-94 

 5-56 

 3-97 

 3-97 

 8.73 



3- 17 



4- 77 

 5-56 

 5-56 

 3-97 

 3- 17 

 2.38 



• 79 

 •79 



Fre- 

 quen- 

 cy. 



Per- 

 cent- 

 age. 



4. 12 



3- 09 

 5-67 

 8.2s 

 4.64 

 6. 19 

 9- 79 

 3-61 

 6. 19 

 4.64 

 5-15 

 6. 19 

 4.64 

 4.64 

 3-09 

 4. 12 

 2. 06 

 I. 03 

 •52 



•52 



1.03 

 I- 03 



Combined 

 years. 



Fre- 

 quen- 

 cy. 



Per- 

 cent- 

 age. 



0.31 

 ■31 

 .94 



• 31 



• 31 



•94 

 2.81 

 1.88 

 2.50 

 3-75 

 2. 19 

 5- 00 

 8.75 

 5-94 

 6.88 

 8. 12 

 3-75 

 5-31 

 6. 25 

 4-38 

 5.62 

 5.00 

 5.00 

 3-44 

 3- 75 



2. 19 



•94 

 .62 

 •31 



n-year-old cows. 



1908. 



Fre- 

 quen- 

 cy. 



Per- 

 cent- 

 age. 



3- 19 

 2. 13 



2- 13 



4. 26 

 4. 26 

 7-45 

 4. 26 

 6.39 



3- 19 

 8.51 

 8.51 

 5-32 

 6.39 

 6-39 

 I. 06 

 I. 06 

 3- 19 

 2- 13 



1. 06 



2. 13 

 I. 06 



Fre- 

 quen- 

 cy. 



Per- 

 cent- 

 age. 



•93 

 •93 



3- 70 

 1.85 

 1.85 

 9. 26 

 5-55 

 3- 70 

 8-33 

 7.41 

 8-33 

 3- 70 

 5-55 

 7.41 

 6.48 

 3- 70 

 4-63 

 2. 78 

 2.78 

 I. 8; 



"l.'Ss 

 I. 8s 

 •93 

 •93 



•93 



Combined 

 years. 



Fre- 

 quen- 

 cy. 



Per- 



cent- 

 age. 



.50 



• 99 



•99 



• 50 

 •99 

 •99 

 ■50 



3-46 

 2.47 

 1.98 

 5-94 

 4-95 

 3- 96 

 7.92 

 5-94 

 7-43 

 3-46 

 6.93 

 7.92 

 5-94 

 4-95 

 5-44 

 1.98 

 1.98 

 2.47 



•99 

 1.48 

 1.98 



•99 

 1.48 



• SO 

 •50 



