738 



INDEX 



Net energy values, continued 



suckling animals, 391 

 maintenance, 271 

 milk production, 494, 497 



equivalent fattening values, 498 

 ruminants, 660 

 swine, 66 1 



work production, 563 

 influence on, 

 of age, 666 



amount of feed, 664 

 breed, 666 

 heavy feeding, 450 

 individuality, 666 

 kind of production, 666 

 method of determination, 271 

 of digestible nutrients, 668 

 relative, for maintenance and fatten- 

 ing, 361 



Neutrality, maintenance of, 189, 335 

 Nitrogen balance, 202 

 determination of, 203 

 example of, 203 

 Nitrogen factors, 69 

 Nitrogen-free extract : 



composition of digested, 121 

 constituents of, 72 



determination of, in feeding stuffs, 71 

 Nitrogen, free, not excreted, 202 

 Nitrogenous products, excretion of, 140 

 Non-nitrogenous matter : 



influence of work on katabolism of, 540 

 katabolized in work, nature of, 542 

 of urine, 159 



origin of, 1 60 

 Non-proteins, 36 



determination of, in feeding stuffs, 69 



digestion of, 96, 100 



general properties of, 36 



groups of, 36 



indirect utilization of, 622 



influence of, on digestibility, 622 



nitrogen factors for, 70 



occurrence of, 36 



value of, 324, 684 



for maintenance, 324 

 Nucleoproteins, 34 



metabolism of, 168 

 Nucleus of cells, 42 

 Nucleic acids, 34 

 digestion of, 99 

 Nutrients : 

 digestible, 599 



computation of, 598 

 of metabolizable energy from, 646 



Nutrients, continued 



net energy values from, 667 

 metabolizable energy of, 648 

 net energy values of, 668 

 significance of, 600 

 functions of, 182 

 mutual replacement of, 270 

 non-nitrogenous, 



effect of deficiency of, 320, 324 



surplus of, 321, 324 

 functions of, 187 

 physiological functions of, 597 

 solution of, in digestion, 101 

 Nutrition, balance of, 192, 201 



includes energy, 216 

 Nutritive effect, live weight as measure 



of, 196 

 total, 195 

 Nutritive ratio, 600 



Oat hulls, 584 



Offal, composition of, 55 



proportion of body ash in, 56 

 fat in, 56 

 protein in, 56 



Oil extraction, by-products of, 586 

 Oil meals, 587 



seeds, 581 

 Oils, distinction between fats and, 19 



ethereal, 40 

 Omasum, 80 

 Organic acids, production of in digestion, 



90 

 Organic matter, 4 



digestible, computation of metaboliz- 

 able energy from, 648 

 net energy values from, 673 

 subdivision of, 4 

 Osmotic pressure, maintenance of, 188 



335 



Outgo of chemical energy, 229 

 in cutaneous excretion, 231 

 feces, 230 

 urine, 231 

 heat, 235 



kinetic energy, 235 

 work, 235 



Over-all efficiency of body, 562 

 Oxygen : 



absorption of, by blood, 135 



through skin, 139 

 consumption of, in metabolism, 146 



determination of, 208 

 supply of, 132 

 Oxyhaemoglobin, 136 



