DAIRY, SEED IMPROVEMENT, STOCK BREEDERS' MEETINGS. 221 



Table 4. 

 Herd B, October i, 191 5. 



Total cows and heifers in herd =20. Total cows dry^l. 



Total cows milking =14. Total heifers not yet freshened =2. 



Total cows which have borne calves = 18. 

 Average Efficiency Percentage of all cows which have borne calves^ 

 89 -1-73 -f-36 -fO -1-0 -f38 -h37 H-73 -f 89 +89 -|-53 +63 +70 +53 +57 +0 +0 +73 = 



18 

 893=49.61% 



18 



Average Efficiency Percentage for all cows now milking=893 =63.79% 



14 



Total lbs. milk produced October 6, 1915=290. 



Average per cow which has borne a calf ^290=16.1 lbs. 



18 

 Average per cow now milking =290 =:20. 7 lbs. 



14 

 Calculated total milk if herd were operating at 100 per cent 

 eflBciency (on the basis of all cows which have borne calves) =29000 =584.6 lbs. 



49.61 

 Calculated total milk (on the basis of all cows now milking) =29000 =454 . 6 lbs. 



Average per cow=:32.5 lbs. 



63.79 



From the above figures it is possible to make precise and 

 definite comparisons between these two herds. We note, in the 

 first place, that Herd B was operating with more than lO per 

 cent greater efficiency at the time the records were made than 



