PEODUCTION OF MILK 209 



is thus valuable for winter feeding when carefully used. 

 Hay produces a harder butter, straw a still harder. 

 Of the straws, oat straw is the best. The cereal 

 grains yield a good percentage of volatile acids in the 

 butter. Oat grain and wheat bran are the best of the 

 cereal foods, and should form a considerable part of the 

 cow's diet for butter production in winter. Legumin- 

 ous grains and straw yield a hard butter. Oilcakes 

 generally harden the butter and raise its melting point. 

 This has been especially proved in the case of cotton 

 cake. The addition of 1 or 2 lbs. of cotton cake to the 

 daily ration of a cow on summer pasture helps to 

 counteract the objectionable softness of the butter at 

 this season of the year. Palm-nut cake and rape cake 

 are favourite foods for winter feeding on the continent, 

 and do not apparently produce a hard butter. Turnips, 

 if used in considerable quantity, strongly flavour both 

 milk and butter; mangels and cabbage are better 

 foods for milkinej cows. 



