CONTENTS. xxvii 



§ 405. The characters of the dormant mammary gland 



§ 406. The connective-tissue of the mammary gland .... 



§ 407. The nature of milk ; its constituents ; their relative quantities in 



different animals 



§ 408. Colostrum, its chemical and microscopical characters 



§ 400. The mammary gland at birth 



§ 410. The nature of the act of secretion of milk 



§411. The secretion of milk typical of metabolism in general . 



§ 4T2. The relations of the gland to the nervous system 



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611 



012 



612 

 614 

 615 

 615 

 616 

 618 



CHAPTER V. 



Nutrition. 



SECTION I. 

 The Statistics of Nutrition. 



§ 413. The composition of the animal body 619 



§ 414. The composition of the starving body and the general phenomena 



of starvation 620 



Comparison of Income and Output of Material. 



% 415. The method of determining the income and output. The respira- 

 tion chamber. The calculation of changes in the body based 



on a comparison of the income and output 622 



§ 416. Nitrogenous metabolism. ' Tissue ' proteids and ' floating ' proteids. 



Luxus consumption 625 



§ 417. The effects of fatty and carbohydrate food 627 



§418. The effects of gelatin as food 629 



§ 419. Peptone as food 629 



§ 420. The effects of salts as food 630 



SECTION II. 

 The Energy of the Body. 



The Income of Energy. 



§ 421. The available potential energy of the several food-stuffs and of an 



ordinary diet 632 



The Expenditure of Energy. 



§ 422. The daily expenditure as heat and as work done. Calorimeters . 634 

 § 423. The energy of mechanical work does not arise exclusively from 



proteid metabolism ; urea and muscular exercise . . . 636 



Animal Heat. 



§ 424. The sources and distribution of heat ; the muscles the chief source 638 

 § 425. The temperature of the body ; cold-blooded and warm-blooded 



animals 640 



