On the Valuation of Unexhausted Manures. 
599 
II. Total ok Original Maxuee-value, of Consumed 
Cattle Foods. 
Table II. (pp. 600-1), shows the method, and the results, of 
the calculation of the total, or oricjinal manure-value of the different 
foods, adopting as a basis their composition as given in Table I. 
The first column of the Table (II.) shows the estimated, 
amounts of each food required to give one part of fattening 
increase in live-weight of oxen or sheep ; and the second column 
shows the amounts of such increase that would, accordingly, be 
yielded by the consumption of one ton of each food. It is 
obvious that some estimate of this kind must be made before 
we can reckon how much of the manure-constituents of the 
food are carried off by the animal-increase, and consequently 
how much will remain for manure. These columns may, 
however, be very seriously misleading, unless their real meaning 
be understood. Thus, if given without further explanation, it 
might be concluded that, by the exclusive consumption by oxen 
or sheep, of one ton of any of the different foods, the amount of 
fattening increase given in the second column of the Table 
would be produced. In other words, that if so given, a ton of 
linseed-cake would yield 373 lbs., a ton of oat-straw 124 lbs., 
or a ton of swedes 20^ lbs. of increase. What is meant is, that 
when any one of the foods is given in the judicious amount, and 
admixture with other foods, which experience shows to be 
beneficial, it may be estimated that one ton of the food so con- 
sumed will, approximately, contribute the amount of increase in 
live- weight stated. 
This will be better understood by giving some explanation of 
the way in which the figures have been arrived at. In the case 
of a few typical foods, a number of feeding experiments were 
selected in which the mixtures given were comparatively simple, 
and the results fairly average ; and the productive effect of the 
particular food has been calculated, by eliminating that of the 
associated food, or foods, as determined in the case of other 
experiments, the results of which have been calculated in the 
same way. For example — the quantity of clover-chaff required 
to produce one of increase in various experiments was deter- 
mined as follows : — 
Clorer-chaff to 
1 increase. 
Oxen — with Linseed-cake, Barley, Swedes, and Clover-chafif .. 13 '0 
Oxen— „ „ „ „ ..14-3 
Sheep — with Linseed-cake, Swedes, and Clover-chaff ,. .. 14 "7 
Sheep — with Barley, Swedes, and Clover-chaff .. .. 13-4 
Sheep— „ „ „ „ .. .. 15-5 
Srean 
142 
