SOME OE THE ANIMALS EED AND SLAUGHTEEED AS HUMAN FOOD. 543 
increase, against about 15 per cent, in the case of the Mirndma analysed fat mq. As 
just stated, there were, in the case of the Sheep, only about 9 parts of dry substance 
stored up in increase, for 100 total dry substance consumed. 
For 100 of MOM-nitrogenous constituents of food, the Pigs would seem to have stored 
up 20 or more oifat, whilst the Sheep yielded only half that amount. 
Oi nitrogenous compounds again, it would appear, according to the estimates, that 
there was on the average about one and a half time as much of the whole consumed 
stored up in the increase, as in the case of Sheep. The average of the estimates for the 
Pigs, shows 7-34 per cent, of the consumed nitrogen stored up, against 7-6 per cent, in 
the case of ^e analysed fat pig. The greater the proportion of pulse in the fattening 
tood of the Pig, the smaller will be the proportion of the whole nitrogen consumed 
which will be stored up in the increase. And on the other hand, the larger the propor- 
tion of cereal, with its comparatively small percentage of niti'ogen, the lai-ger will be the 
proportion of the whole carried off in the increase in weight of the animals The 
evidence at command would lead to the belief, however, that there is almost uniformly 
less than 10 per cent., and sometimes perhaps as little as 5 per cent, of the nitrogen of 
the food of fattening pig carried off in its increase. 
It has already been pointed out, how small, in aU probability, was the percentage of 
mineral matter m the increase of the rapidly fattening Pig. Eeasons were given for sup- 
^smg, however, that our estimates might show it to be lower than really was the case. 
ere IS little use therefore in examining at all closely results which are based upon 
those doubtful estimates. Moreover as the mineral matter in the food varies very much 
indeed m its proportion to those constituents which prominently rule the amount and 
c aracter of the increase, the proportion of the mineral matter consumed by the fatten- 
ing ig, as well as the fattening Sheep, which will be stored up in the increase, will be 
much more variable than that of the other constituents. It is sufficient to say, that in 
the case of fattenmg Pigs at least, the proportion of the consumed mineral matter which 
w no e reclaimed in the manure is almost immaterial. 
Finally in regard to the results of Table XIII., it appears that for eveiy 100 parts of 
the food), 400 to 600 parts of fat stored up in the increase of the animal. It is 
0 vious, t erefore, that there was a formation of fat in the animal body, from some other 
constituent or constituents of the food. To this point we shall recur presently. 
2. Armunts of Miml Matter. Nitrogenous Compounds, Pat, and Total Dry Snlstance 
lir oTi** of matter expired, perspired, or voided, for 100 o/ Collective 
AJry oubstance consumed in Food. 
of fert^Zro^ means of Tables XII. and XIII. shown the probable proportion of each 
ta th?“ “ tr 1 ““ be stored up 
wiU be weTlTVll r"® consumed in the food, it 
O o ow up the illustration by showing, on the same basis of calculation, 
4 B 2 
