730 



INDEX 



Energy, continued 



outgo of, 235 

 losses of, 229, 235, 635 

 chemical, 299, 635 

 in feces, 230, 635 



fermentation, 230, 636 

 computation of, 627 

 heat production, 235, 650 

 urine, 231, 636 

 metabolizable, 231, 639 



comparison of net energy values 



with, 271 

 computation of, 

 from digestible nutrients, 646 



organic matter, 648 

 factors for, 234 

 for the horse, 675 

 general conception of, 231 

 influence on, of amount of feed, 664 

 method of determining, 640 

 of digestible nutrients, 648 



feeding stuffs, 642 

 real and apparent, 645 

 significance of, 645 

 synonyms for, 233 

 net. '(See Net Energy) 

 outgo of, 229, 235, 635, 650 

 in combustible gases, 230, 636 

 feces, 230, 635 

 heat production, 235, 650 

 urine, 231, 636 



production values as regards, 634 

 protein as source of, 318 

 rate of gain of, in growth, 378 

 requirements 

 for fattening, 361 

 growth, 399 

 of cattle, 399 

 sheep, 401 

 swine, 400 

 maintenance, 267 

 factors affecting, 304 

 influence on 

 of age, 307 

 fattening, 306 

 plane of nutrition, 305 

 stage of fattening, 362 

 temperature, 304 

 manner of stating, 283 

 methods of determining, 281 

 modified conception of, 284 

 of cattle, 288 

 farm animals, 280, 303 

 fowls, 301 

 horses, 295 



Energy, continued 

 sheep, 292 

 swine, 285 



relation of temperature to, 308 

 meat production, 448 

 milk production, 511 

 work production, 562, 564 

 sources of, for work, 542 

 supply, influence of, on retention of 



protein, 386 



total, not measured by heat of com- 

 bustion, 223 

 transformations of, 218 



in muscular contraction, 533 

 units, 220 

 utilization of, 

 in growth, 390 



milk production, 493 

 work production, 544 

 values, net. (See Net Energy Values) 

 Environment, influence of, on milk 



production, 478 



Enzym reactions reversible, 1 50 

 Enzyms as agents in metabolism, 148 

 digestive, 78 

 extracellular, 148 

 intracellular, 149 



in the body, 150 

 Epithelium, 105 

 Erepsin, 79, 87, 98 



action of, on proteins, 98 

 Esophagus, 79 

 Ether extract : 

 digested, 122 

 digestibility of, 119 

 of feeding stuffs, 70 

 Excretion, 123, 139 



functions of kidneys in, 140 

 of ash ingredients, 141 

 carbon dioxid, 139 

 nitrogenous products, 140 

 water, 142 

 Exercise : 



feed cost of, 481 



influence of, on meat production, 457 

 milk production, 480 

 yield of milk fat, 482 

 Expenditure, balance of income and, 194 

 of energy in horizontal locomotion, 



. 55 

 Extractives, percentage of, in lean meat, 



357 



Farm animals, composition of bodies of, 

 62 



