XXVI 



CONTENTS. 



§ 378. The relations of the secretion of bilirubin to the secretion of bile 



acids 587 



§ 379. The relation of the secretion of bile to the formation of glycogen . 587 



SECTION IV. 



On Urea and on Nitrogenous Metabolism in general. 



§ 380. Urea the end-product of the metabolism of proteid matter . . 589 



§ 381. Urea probably the result of a series of changes .... 590 



§ 382. The kreatin of muscle in its relations to urea 590 



§ 383. Difficulties presented by the normal presence of kreatin in urine . 591 



§ 384. The nitrogenous metabolism of the nervous tissues .... 592 

 § 385. The nitrogenous metabolism of the glandular structures. The 



increase of urea due directly to food 593 



§ 386. The formation of urea in the liver 594 



§ 387. The synthesis of urea 595 



§ 388. Uric acid 596 



§ 389. Other nitrogenous crystalline bodies, such as xanthin, &c. . . 597 



§ 390. Relations of urea to cyanogen compounds 598 



§ 391. A summary of nitrogenous metabolism 599 



SECTION V. 



On some Structures and Processes of an obscure Nature. 



§ 392. The structure and functions of the thyroid body .... 600 



§ 393. The pituitary body 601 



§ 394. The structure, chemical constituents, and functions of the supra- 

 renal bodies 601 



§ 395. The structure, nature, and functions of the thymus . . . 602 



SECTION VI. 



The History of Fat. Adipose Tissue. 



§ 396. Adipose tissue ; its changes 



§ 397. The structure of adipose tissue . 



§ 398. The disappearance of fat from adipose tissue 



§ 399. The nature of fat in adipose tissue . 



§ 400. Fat is formed in the body .... 



§ 401. Formation of fat from carbohydrates and from proteids 



§ 402. Limits to the construction of fat 



604 

 604 

 605 

 606 

 606 

 608 

 609 





§ 403. 

 § 404. 



SECTION VII. 



The Mammary Gland. 



The general structure of the mammary gland 



The structure of the alveoli ; the varying appearances of the epi- 

 thelial cells 



610 



fill) 



