xx CONTENTS. 



PAGE 



487. The nitrogenous metabolism of the glandular structures. The 



increase of urea due directly to food 789 



488. The formation of urea in the liver 790 



489. The synthesis of urea 791 



490. Uric acid 792 



491. Other nitrogenous crystalline bodies such as xanthin &c. . . 793 



492. Kelations of urea to cyanogen compounds 794 



493. A summary of nitrogenous metabolism 795 



SECTION VI. 

 ON SOME STRUCTURES AND PROCESSES OF AN OBSCURE NATURE. 



494. The structure of the thyroid body 796 



495. The functions of the thyroid body 798 



496. The pituitary body 800 



497. The structure of the suprarenal bodies 800 



498. The chemical constituents of the suprarenal bodies .... 802 



499. The functions of the suprarenal bodies 802 



500. The structure of the thymus 803 



501. The nature and functions of the thymus 804 



SECTION VII. 

 THE HISTORY OF FAT. ADIPOSE TISSUE. 



502. Adipose tissue ; its changes 805 



503. The structure of adipose tissue 805 



504. The disappearance of fat from adipose tissue 807 



505. The nature of fat in adipose tissue 808 



506. Fat is formed in the body 808 



507. Formation of fat from carbohydrates and from proteids . . . 809 



508. Limits to the construction of fat 811 



SECTION VIII. 

 THE MAMMARY GLAND. 



509. The general structure of the mammary gland ..... 813 

 510. The structure of the alveoli ; the varying appearances of the epithelial 



cells 814 



511. The characters of the dormant mammary gland .... 816 



512. The connective-tissue of the mammary gland 816 



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



different animals . . . 816 



514. Colostrum, its chemical and microscopical characters . . . 819 



515. The mammary gland at birth 819 



516. The nature of the act of secretion of milk 820 



517. The secretion of milk typical of metabolism in general . . . 821 



518. The relations of the gland to the nervous system . . . . . 822 



