DESCRIPTION OF FEEDING-STUFFS 213 



be given to horses, if gradually introduced into the 

 ration, in quantities of 5-6 lbs. per 1000 lbs. live 

 weight per day, without impairing the efficiency 

 of the animal. Feeding sugar is not suitable for 

 ruminants, owing to its less powerful effect as a 

 food, and it is still doubtful, in spite of many in- 

 vestigations, whether it is useful for pigs. Whether 

 the preparation of sugar for feeding purposes is 

 profitable, or whether it would not be better to 

 leave the sugar in the beets and use these, has not 

 yet been satisfactorily decided. 



(9) Residues from fermentation processes. 



Amongst the residues from the breweries and 

 distilleries are found several substances, such as 

 malt culms, brewers' grains, and various distillers' 

 and brewers' wastes, which are sometimes called 

 slumps. Malt culms or coombs ought to have 

 a bright colour, for if they have been dried 

 too much they are less digestible. Damp, mouldy 

 material is often dried a second time, and then 

 becomes dusty, and has a darker colour, and this 

 is sometimes bleached with sulphur dioxide, which 

 serves also to get rid of the musty smell. 



Malt coombs are particularly rich in non-protein 

 nitrogenous substances (6-8%), and also contain 

 a fair amount of sugar (12-13%). They are par- 

 ticularly prized as food for milking cows, which 



