290 



Journal of Agricultural Research voi. xvn. no.6 



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

 cows of different ages — Continued 



Yield (in 

 gallons). 



8.00. . 

 8.50. . 

 9.00. . 

 9-5° ■ 

 10.00. 

 10. so. 

 11.00. 

 11.50. 

 la.oo. 

 13.50. 

 13-00. 

 13-50. 

 14.00. 

 14-50. 

 15.00. 

 »SSO. 

 16.00. 

 16.50. 

 17.00. 

 17-50. 

 18.00. 

 18.50. 

 19.00. 

 19-50. 

 30.00. 

 30.50. 

 31.00. 

 21.50. 



32. 00. 



32.50. 

 33.00. 

 23-50. 

 24.00. 

 34-50. 

 35.00. 

 35-50- 

 36.00. 

 36.50. 

 37.00. 

 39.00. 



30.50- 



6-year-old cows. 



1908. 



Fre- 

 quen- 

 cy. 



per- 

 cent- 

 age. 



o- 61 



•31 



•31 

 •31 

 .61 

 •31 



6. 12 



9- 17 



7- 6s 



4.89 



5. 20 



6. 12 



7-95 



7-34 



3-36 



3-98 



2.44 



1-83 



2.44 



•31 



1-83 



.92 



•31 



.61 



•31 



•31 



•31 



Total. 



Fre- 

 quen- 

 cy. 



Per- 

 cent- 

 age. 



4- 19 

 S-03 

 6.29 

 5-66 

 S-45 

 9.64 

 5-03 

 6.92 

 7-34 

 S-24 

 4.61 

 4.40 

 4.40 

 4- 61 

 3-97 

 I- 26 



2-52 



I- 68 

 1-05 



Combined 



years. 



Fre- 

 quen- 

 cy. 



804 



Per 

 cent- 

 age. 



•50 



•2S 

 I. 00 

 1.99 

 1.99 



3- 61 

 4-23 

 S-72 

 S-3S 

 4.98 

 8.21 

 6. 72 

 7.21 

 6-34 

 5.22 



5-32 



S-8S 



5.60 



4. 10 



3-98 



1.74 



2.24 



1.99 



•75 



•87 



.62 



•50 



•75 



•37 



•^S 



7-year-old cows. 



1908. 



Fre- 

 quen- 

 cy. 



316 



Per- 

 cent- 

 age. 



I. 26 

 2-53 



2- 22 

 3-16 



4-43 

 4- 75 

 6-65 

 7- 28 

 7^59 

 3- S3 

 8.54 

 4^43 

 6-33 

 S-70 

 S-38 

 4-75 

 2-85 

 3-48 

 4. II 



.63 

 I-S8 

 1-58 

 1.58 



•95 



Fre- 

 quen- 

 cy. 



396 



Per- 

 cent- 

 age. 



0. 25 



•25 

 •25 



.76 



•2S 



1. 01 



1.76 



2. 27 



5- 30 



5-56 



6-82 



S-8i 

 7-07 

 9.60 

 7-83 

 S-S6 

 6^57 

 6.31 

 4.80 

 3-54 

 4- 55 



2- 02 



1- SI 



2- 27 



I- 26 

 I- 52 

 ■• 25 

 .76 



Combined 

 years. 



Fre- 

 quen- 

 cy. 



Per- 

 cent- 

 age. 



.14 

 • 14 

 .38 

 .84 

 .28 

 1.54 

 1.54 

 239 

 2. 12 



4-35 

 5- 06 

 5-92 

 6. 18 

 7- 16 

 8.71 

 $•48 

 6.88 

 5- 6a 

 6.33 

 5. 20 

 4-3S 

 4-63 

 2-39 

 2-39 

 3- 09 



.70 

 I. 26 



.70 

 1-40 

 X- 36 



.14 



.98 



