xvi CONTENTS. 



SECTION VI. 

 THE NATURE AND AMOUNT OF PERSPIRATION. 



PAGE 



438. Sensible and insensible perspiration. The characters and constituents 



of sweat ..;,.. 694 



Cutaneous Respiration. 

 439. The nature and amount of cutaneous respiration. The effects of 



varnishing the skin 696 



440. Absorption by the skin . . . . . . . . . 697 



SECTION VII. 

 . THE MECHANISM OF THE SECRETION OF SWEAT. 



441. The relation of sweating to vascular changes. The nervous mechanism 



of the sweat-glands . . . 699 



442. The sweat-nerves, their origin and course 701 



443. Inhibitory sweat-nerves 702 



CHAPTER IV. 



THE METABOLIC PROCESSES OF THE BODY. 

 444. The general characters of the metabolism of the body . . . . 703 



SECTION I. 

 THE STRUCTURE OF THE LIVER. 



445. The general structure of the liver .705 



446. The structure of a lobule of a liver 706 



447. Glisson's capsule ; the terminations of the hepatic artery . . 707 



448. The structure of the bile ducts 708 



449. The structure of the hepatic cells. Glycogen 708 



450. The arrangement of the cells. The bile capillaries . . . 709 



451. The structure of the liver of the Frog .... . 711 



452. The lymphatics of the liver . . . . . . . 712 



SECTION II. 

 THE HISTORY OF GLYCOGEN. 



453. The characters of glycogen 714 



454. The conversion of glycogen into sugar by the liver .... 715 

 455. The influence of various foods in storing up glycogen. The storage 



of glycogen in the winter frog . . . . ' 716 



456. The detailed characters of the hepatic cells in the frog ... 719 

 457. The histological changes induced by food and circumstances in the 



hepatic cells of the frog . . >. ... . . 720 



