ILLINOIS DAIRYMEN'S ASSOCIATION. 279 



day on December 28th, yet this is approximately what No. 7 was 

 doing at that time, while No. 8 was yielding still less. No. 13 

 freshened two months later than No. 1, and during the week 

 ending December 28th, produced only 131.3 pounds of milk 

 containing 5.51 pounds of butter fat. More than that,, notice 

 how rapidly she decreased in amount of milk in the successive 

 tests, while No. 1 maintained her production. Both cows were 

 of the same age and notwithstanding the advantage of having 

 freshened two months later than No. 1, cow No. 13 fell off 42.7 

 per cent in milk and 40.2 per cent in butter fat production, and 

 during the same time No. 1 shrank only 13.4 per cent in milk 

 and 3 per cent in quantity of butter fat. Differences of this 

 kind show very clearly the importance attached to the weeding-out 

 process. If the owner of this herd had been careful to use a 

 pure-bred dairy sire continuously and had exercised the requisite 

 amount of care in weeding out his low producing individuals, he 

 would have been in possession of a highly profitable herd. 



Herd No. 4. W. P. 



Table 6. Shows the Weekly Production of No. 1 in Comparison with that 



of Three Other Cows which were Removed Because of Inefficiency. 



Test Pounds 



No. Month week Pounds Pece butter A __, b^o/i 



cow fresh ending milk fat fat Age met a 



1 September Dec. 28 158 2 5.0 7.91 6 Jersey 



1 Septemb r Feb. 28 133.3 5 1 6 79 6 Jersey 



1 September May 1 137.0 5.6 7.67 6 Jersey 



Dec. 

 Feb. 

 May 



28 



28 



1 



28 

 28 



28 

 28 



158 2 

 133.3 



137.0 



100.2 

 57.1 



93.4 



75.8 



5.0 

 5 1 

 5.6 



7.91 

 6 79 



7.67 



Dec. 

 Feb. 



3.9 

 3.7 



4.9 

 4.6 



3.90 

 2.11 



Dec. 

 Feb. 



4.57 

 3.48 



7 July Dec. 28 100.2 3.9 3.90 9 Gr. Shorth'n 



7 July Feb. 28 57.1 3.7 2.11 9 Gr. Shorth'n 



8 July Dec. 28 93.4 4.9 4.57 8 Gr.Hareford 



8 July Feb. 28 75.8 4.6 3.48 8 Gr.Hareford 



13 November Dec. 28 131.3 4.2 5.51 6 Gr. Shorth'n 



13 November Feb. 28 101.3 4.2 4.25 6 Gr. Shorth'n 



13 November May 1 75.1 4.4 3.30 6 Gr. Shorth'n 



Herd No. 6. G. W. 



This is one of the best herds of registered and grade dairy 

 cattle in Southern Illinois. The high average production of 

 285.21 pounds of butter fat per year for the herd indicates the 

 large productive capacity of the cows. This herd shows very 

 nicely the excellent results obtained through improvement by the 



