84 SCIENTIFIC FEEDING OF ANIMALS 



the animal the following quantities, in grams, of 

 fat- 



Cotton-seed Earth-nut Palm-nut Linseed 

 cake meal. meal. cake meal, cake meal. 



From the protein 93 102 34 81 

 fat .78 47 45 50 

 carbo- 

 hydrates* 30 4a 100 65 



Altogether 201 189 179 196 



In the experiment f 

 with the animal 

 there was acually 

 found . . 197 189 183 192 



Thus there is an almost complete agreement 

 between the calculated quantity of fat and that 

 actually found in the animal. It is seen that the 

 digested nutrients have in fact acted exactly as if 

 the same quantities of pure digestible protein, fat, 

 or carbohydrates had been given to the animal. 

 From these facts it is shown further that the pro- 

 tein, fat, and carbohydrates have the same action, 

 although coming from such different materials as 

 the four oil-cake meals. Finally, these experi- 

 ments teach that the figures obtained are a good 

 standard by which the action of the different food- 

 stuffs can be measured. 



Investigations with a number of different hays 



* Carbohydrates = nitrogen-free extract + crude fibre, 

 t Inclusive of very small quantities of flesh which were calculated 

 as fat, and this amount added to the other fat. 



