152 



Maine Agricultural Experiment Station. 1917. 



Age in Trs. 



Pounds Milk in 



Age in Trs. 



Pounds Milk in 



and Mos. 



7-day Test. 



and Mos. 



7-day Test. 



10:1 



253.14 



13:5 



243.07 



10:2 



253.01 



13:6 



242.70 



10:3 



252.87 



13:7 



242.33 



10:4 



252.72 



13:8 



241.95 



10:5 



252.57 



13:9 



241.57 



10:6 



252.41 



13:10 



241.18 



10:7 



252.24 



13:11 



240.78 



10:8 



252.07 



14:0 



240.38 



10:9 



251.89 



14:1 



239.98 



10:10 



251.71 



14:2 



239.57 



10:11 



251.52 



14:3 



239.15 



11:0 



251.32 



14:4 



238.73 



11:1 



251.12 



14:5 



238.31 



11:2 



250.91 



14:6 



237.88 



11:3 



250.69 



14:7 



237.44 



11:4 



250.47 



14:8 



237.00 



11:5 



250.25 



14:9 



236.55 



11:6 



250.01 



14:10 



236.10 



11:7 



249.77 



14:11 



235.67 



11:8 < 



249.53 



15:0 



235.18 



11:9 



249.28 



15:1 



234.72 



11:10 



249.02 



15:2 



234.25 



11:11 



248.76 



15:3 



233.77 



12:0 



248.49 



15:4 



233.29 



12:1 



248.22 



15:5 



232.80 



12:2 



247.94 



15:6 



232.31 



12:3 



247.65 



15:7 



231.81 



12:4 



247.36 



15:8 



231.31 



12:5 



247.06 



15:9 



230.81 



12:6 



246.76 



15:10 



230.29 



12:7 



246.45 



15:11 



229.78 



12:8 



246.14 



16:0 



229.26 



12:9 



245.82 



16:1 



228.73 



12:10 



235.49 



16:2 



228.20 



12:11 



245.17 



16:3 



227.66 



13:0 



244.83 



16:4 



227.12 



13:1 



244.49 



16:5 



226.58 



18:2 



244.14 



16:6 



226.03 



13:3 



243.79 



16:7 



225.47 



13:4 



243.43 



16:8 



224.92 







16:9 



224.35 



Summary 



1. Milk production changes with age in a definite manner. 



2. This change follows a logarithmic curve of the form 

 y=a-]-bx^-\-c log x where 3'=production and x^age. 



3. Maximum production is reached at approximately the 

 age of 8 years and 7 months. 



