54 



according to the special point under enquiry. The 

 composition of the foods was determined by analysis. 

 The weights of the animals were taken, at the com- 

 mencement, at intervals during the progress, and at the 

 conclusion, of the experiment. 



The amount, and the relative development, of the 

 different organs and parts, were determined in 2 

 calves, 2 heifers, 14 bullocks, 1 lamb, 249 sheep, and 

 59 pigs. 



The percentages of water, mineral matter, fat, and 

 nitrogenous substance, were determined in certain sepa- 

 rated parts, and in the entire bodies, of 10 animals ; 

 namely, 1 calf, 2 oxen, 1 lamb, 4 sheep, and 2 pigs. 

 Complete analyses of the ashes, respectively, of the 

 entire carcasses, of the mixed internal and other " offal " 

 parts, and of the entire bodies, of each of these 10 

 animals, have also been made. 



From the data thus provided, as to the composition 

 of the different descriptions of animal, in different con- 

 ditions as to age and fatness, the composition of the 

 increase whilst fattening, and the relation of the con- 

 stituents stored up in increase to those consumed in 

 food, have been estimated. 



To ascertain the composition of the manure in rela- 

 tion to that of the food consumed, oxen, sheep, and pigs, 

 have been experimented upon. 



In the case of oxen, the food and litter (sometimes 

 with an acid absorbent) were weighed, sampled, and 

 analysed. The animals were fed in boxes for periods 

 of from 5 to 9 weeks, and the total manure produced 

 was well mixed, weighed, sampled, and analysed. The 

 constituents determined in the food and litter on the 

 one hand, and in the manure on the other, were dry 

 matter, ash, and nitrogen. 



In the case of sheep no litter was used ; the animals 

 were kept in lots of 5, on rafters, through which (but 

 with some little loss) the solid and liquid excreta 

 passed on to a sheet zinc flooring, at such, an incline 

 that the liquid drained off into carboys containing acid, 

 and the solid matter was removed 2 or 3 times daily, 



