10 On the Valuation of Unexhausted 3Ianiires. 
1. MaNTTKE from Pl-BCHASED (OK SaLEABLE) FeEDENG-STUFFS. 
Claims for compensation for unexhausted manures will pro- 
bably arise more frequently under this head than under any 
other. It will be necessary, therefore, to consider the question 
in some detail. 
When the farmer uses purchased feeding-stuffs, or food the 
produce of the farm which he would otherwise be justified in 
selling, he looks for his remuneration partly to the increased 
value of his animals, and partly to the value of the manure 
obtained from them. The increased value of the animals is of 
itself seldom, if ever, equal to the cost of the food consumed. 
Unless, therefore, the outgoing tenant can rely upon obtaining 
compensation for the value of the manure produced from such 
food, he must either cease to purchase it, and feed his animals 
on the non-saleable produce of the farm alone for a year or two 
before he leaves it, or he must submit to a loss which sometimes 
will be very considerable. 
Before we can approach the question of the value of the 
unexhausted residue of manure produced by the consumption of 
purchased (or saleable) food-stuffs, it is necessary to come to 
some decision as to the original value of such manure. In other 
words, we must endeavour to determine how much of the cost 
of any particular food should be charged to the manure account. 
With regard to the value of different foods for feeding pur- 
poses, it may be stated in general terms, as the conclusion drawn 
from hundreds of feeding experiments with different descriptions 
of food made at Rothamsted, that, weight for weight, there is 
very much less difference in the feeding-value than in the manure- 
value of foods which are included in what may be called the 
same class. For instance, it will make comparatively little dif- 
ference, so far as the increase in live-weight of the animal is 
concerned, whether a ton of cake, a ton of pulse, a ton of Indian 
moal, or a ton of barley, be given to fattening oxen o^ sheep, 
and comparatively little whether a ton of clover-hay or a ton of 
meadow-hay be used. Within each of these classes of food, 
however, there would be a much wider difference in the value 
of the manure which the consumption of a ton of each of them 
would produce. 
Having regard to the results of the feeding-experiments above 
referred to, and taking into consideration the known average 
composition of different descriptions of food, an estimate was 
made of what proportion of certain of the constituents in a ton of 
various foods would, on the average, be stored up in the animal 
itself, and what proportion would be obtained in the manure 
produced. The value, for manure, of those' constituents was 
