330 Agricultural Chemistry — Sheep- Feeding and Manure. 



that supplied in the food, is more uniform throughout the pens, 

 and that the average amount is greater in this than in the former 

 series of experiments. 



In the following Tables are given the amounts of food or con- 

 stituents consumed weekly in each pen, to every 100 lbs. live 

 weight of animal, and also the amounts consumed to produce 

 100 lbs. increase in live weight. 



In the first division of Table 10 we at once observe that there 

 was a considerably larger quantity of mangold-wurzel consumed 

 per week to an equal live weight of animal, with the steeped 

 barley, than with any of the other foods ; and if we turn to the 

 second division of the Table, we shall gather that this cannot 

 altogether be accounted for by the demand of the system for non- 

 nitrogenous organic matter, unless, indeed, there was in this case 

 a more rapid expenditure of food than in the others, which how- 

 ever not improbably was the case, since in this instance the in- 

 crease was greater than in the rest. There is, nevertheless, some 

 indication that such demand did so operate to a certain extent. 

 Thus, taking the instances of pens 1 and 3, in both of which the 

 special food was barley, we find that with the smaller amount of 

 dry organic substance in the barley (of which the composition, 

 though not the condition, w 7 ould of course be similar in the two 

 cases) of pen 3 than in that of pen 1, there is at the same time in 

 the former a more than compensating increased amount consumed 

 in the mangolds ; and again, taking pens 2 and 4, with malt, 

 we see that with the smaller amount of dry organic matter 

 consumed in the malt in pen 4, there is at the same time an 

 increased amount in the mangolds. The 5th pen, also having 

 malt as a special food, is, however, quite an exception to this 

 rule ; for with about one-fourth more dry organic substance in 

 the malt than in either pen 2 or pen 4, we have at the same time 

 a larger quantity consumed in the mangolds, the cause of 

 which may possibly be sought in the fact before alluded to/ of 

 a more active circulation and passage of the food in and 

 through the body, dependent here probably upon the larger 

 amount of the more fully elaborated and less amount of the crude 

 constituents of the food as supplied in the malt. It is interesting 

 to observe, too, that, excepting pen 6, there is almost identically 

 the same order observed in the supply of nitrogen as in that of 

 the dry organic matter in the respective foods of the several pens. 

 This is a result very contrary to that obtained in the former 

 series, but as there was here a much more uniform proportion of 

 the nitrogenous to the ?z(?tt-nitrogenous compounds in the several 

 foods than in those of the other cases, it is not in any degree 

 opposed to the conclusion before arrived at, viz. that consumption 

 is, within a certain limit, regulated more by the amount of the 



