

351 



In oxen and sheep, the pelt, hair or wool, hoofs, stomachs and 

 intestines, taken together, contained a large proportion of the total 

 nitrogen of the offal parts. The portions of the nitrogenous offal 

 parts of these animals, generally used for food, are, the head-flesh 

 with tongue and brains, the heart, the liver, the pancreas, the 

 spleen, the diaphragm, and sometimes the lungs. In the pig, the 

 proportion of the nitrogenous offal generally eaten, is greater than 

 in the other animals; but its proportion of fat is generally also 

 greater. 



With the higher per-centage of nitrogenous substance, and the 

 less per-centage of fat, in the collective offal parts, they had in- 

 variably a less per-centage of total dry substance, and therefore more 

 of water, than the collective carcass parts. 



From the composition of the entire bodies of the animals analysed, 

 it is estimated, that of mineral matter, the average amount, in store 

 or lean animals, will probably be, in oxen 4-J- to 5 per cent., in sheep 

 3 to 3^ per cent., and in pigs 2^ to 3 per cent. As an average esti- 

 mate for the mineral matter in fattened animals, the results indi- 

 cated 3^ to 4 per cent, in the live-weight of calves and oxen, 2-i- to 

 2f per cent, in that of sheep and lambs, and 1^ to If per cent, in 

 that of pigs. 



Of total nitrogenous compounds, there were in the fasted live- 

 weight of the fat ox 14^ per cent., in that of the fat sheep 12^ per 

 cent., in that of the very fat one not quite 1 1 per cent , and in that 

 of the moderately fattened pig about the same, namely, 10*87 per 

 cent. The leaner animals analysed contained from 2 to 3 per cent, 

 more nitrogenous substance than the moderately fattened ones. 



The Fat formed the most prominent constituent of the dry or 

 solid substance of the entire animal bodies. The fat calf alone 

 contained less total fat than total nitrogenous compounds. Of the 

 other professedly fattened animals, the entire bodies of the fat ox 

 and fat lamb contained about 30 per cent., that of the fat sheep 

 35^ per cent., that of the very fat sheep 45f per cent., and that of 

 the moderately fat pig 42^ per cent, of dry fat. 



The average composition of the six animals assumed to be well 

 fattened, showed, in round numbers, 3 per cent, of mineral matter, 

 12^ per cent, of nitrogenous compounds, and 33 per cent, of fat, in 

 their standing or fasted live-weight. 



VOL. ix. 2 B 



