No. 599] 



ADVANCED REGISTRY COWS 



of points, many of them corroborating those brought out 

 in the discussion of the milk-production curves. 



Owing to the variation of the weight classes in per 

 cent, fat, the curves of milk production and fat produc- 

 tion agree very well when compared with the Holstein- 

 Friesian Association requirement curve. 



The requirement curve in fat production (No. 4) 

 crosses the Holstein-Friesian Association curve at a 



Curve, s of Fof Products - Ay H 



greater age than that worked out for milk production. 

 This would indicate that the classes up to 3£ years pro- 

 duced milk containing a lower per cent, fat than the mean 

 of the whole population. This is correct, as can be iound 



