\S2 BARLEY. 



1. Organic analysis. 



A hundred pounds of the fresh draff were found to contain 



Water 75-85 



Gum 1-06 



Other organic matter (chiefly husk) ..... 21 '28 



Organic matter, containing nitrogen (proteine compounds) - 0'62 



Inorganic matter or ash -. - - - - - 1*19 



100-00 



From the above analysis we see that, during the digestion of the malt in the mash-tub, 

 the proteine compounds — those which contain nitrogen, and are necessary to the produc- 

 tion of muscle in the body, and curd in the milk — are nearly all dissolved out. 



2. Inorganic analysis. 



The ash left on burning the draff was found to consist of 



• 



Alkaline salts (chlorides, with a small quantity 

 of sulphates) and alkali .... 



Phosphoric acid in combination with the alkali - 

 Earthy phosphates ------ 



Silica -------- 



99-22 11-90 49-28 



An examination of the above numbers suggests the following remarks in regard to the 

 value of draff in comparison with other kinds of food. 



a. The quantity of water present in it is 76 per cent ; in this respect it approaches very 

 near to potatoes, and some other varieties of green food. It contains, however, conside- 

 rably less than the turnip or the cabbage. 



6. The greater part of the solid matter, as we should suppose, consists of husk. This 

 is not wholly insoluble in the stomach of the cow, nor without considerable nutritive 

 power. It is impossible, from theoretical considerations, to assign any definite value to 

 this husk ; but the experience of the cowfeeder seems to show that it is not by any means 

 worthless in the feeding of milk-cows. In the grains of the brewers it is generally under- 

 stood that the proportion of nutritive matter left is much less than in those of the distiller. 



c. One important result is the small proportion of proteine compounds, amounting only 

 to two and a half per cent in the dry grains. No doubt this proportion will vary in dif- 

 ferent samples. It is probably attached to the husk in the form of coagulated albumen, 

 which, however, is dissolved and appropriated in the stomach of the animal. 



The draff weighs about 46 lbs. to the bushel, and costs 3d. to3^d. for this weight. One 

 hundred and sixty pounds of draff contain one of albumen, and this weight costs Is. Five 



Per cent of 

 ash. 



In 1000 purls ol 

 wel draff. 



In 1000 parts of 

 dry draff. 



7-60 



0-90 



3-72 



2-11 



0-25 



1-04 



4S-00 



5-81 



24-06 



41-51 



4-94 



20-46 



