548 



PHYSIOLOGY AT THE FARM. 



1.6 per cent of flesh-formers, and 5.11 per cent of mineral 

 matters in the ash. 



740.5 



43.95 



91.37 



The 43.95 oz. of flesh-formers are somewhat above the re- 

 sult brought out by Playfair, who, however, does not give the 

 data on which he proceeds. Such slight differences need not 

 surprise us, since in different analyses even the substances 

 subjected to that process at different times and under opposite 

 circumstances must vary not a little in composition. But the 

 constant very close relation, in the present day, between the 

 proportions assigned to the different orders of constituents 

 cannot but give us great confidence in the general accuracy of 

 such analyses. 



Playfair makes the labour flesh-formers in the food of the 

 horse 27 out of the 56.5 of the total plastic or flesh-forming 

 food, so that if we make a proportion in which the whole 

 plastic food of the horse is set down as bearing the same ratio 

 to the labour plastic food of the horse as the whole plastic 

 food of the ox to the labour plastic food of the ox, then the 

 last term will be determined thus 



56.5 : 38.6 : : 27 : 18.4. the labour plastic food of the ox. 

 Hence in the case the common case in this countrv in 



