228 



ILLINOIS DAIRYMEN'S ASSOCIATION. 



contents, except to aid in the discussion. The best ten cows test- 

 ed produced 388.75 pounds, the poorest ten 109.42 pounds, the 

 average of all tested being 224.57 pounds of butter fat. The 

 average production of the poorest herd is 142.05 pounds of butter 

 fat, which is approximately the same as the average production 

 of a dairy cow in Illinois. Table 7 shows that the difference 



TABLE SEVEN. 



Average Production- 



Herd. 



Best, No. 24 



Poorest, No. 



Average, No. 

 Poorest, No. 



23 



No. of 

 Cows 

 .. . 9 

 . . .25 



Poorest and Best Herds. 



Value Milk Value 



Lb. B. $1.15 F.F. 25c 



Fat. per 100. per lb. 



350.17 68.09 87.54 



142.05 38.11 35.51 



Per cent 

 Lb. Milk. Fat. 

 5921.41 5.91 

 3314.10 4.28 



2607.31 208.12 



Difference in B. F. 146.5 Per Cent. 

 Average Production — Poorest and Average. 



1 11 5753.05 4.54 261.61 



23 25 3314.10 4.28 142.05 



29.98 



66.16 

 38.11 



52.03 



65.40 

 35.51 



2438.95 119.56 28.05 



Difference in B. F 84.1 per cent 



Best 10 cows tested 388.75 lbs. B. fai. 



Poorest 10 cows tested 109.42 lbs. B. fat. 



Average all cows tested 224.57 lbs. B. fat. 



Average all cows tested 224.57 



Average poorest herd 142.05 



82.52 



Best 10 cows tested 388.75 



Average poorest herd 142.05 



246.70 



Cows in Illinois 995,429 



25 per cent improved 248,857 



746,572 



746,572 x 82.52 lbs 61,607.121.44 lbs. 



61,607,121.44 lb @ 25c $15,401,780.36 



746,572 x 246.7 lbs 184,179,312.4 lbs. 



184,179,312 lbs. @ 25c $46,044,828 



between the average production of all cows tested and the average 

 of the poorest herd is 82.52 pounds. What would be the effect 



