xviii CONTENTS. 



SECTION VI. 

 THE NATURE AND AMOUNT OF PERSPIRATION. 



PAGE 



438. Sensible and insensible perspiration. The characters and constituents 



of sweat 728 



Cutaneous Respiration. 



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



varnishing the skin 730 



440. Absorption by the skin . 731 



SECTION VII. 

 THE MECHANISM OF THE SECRETION OF SWEAT. 



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



of the sweat-glands 733 



442. The sweat-nerves, their origin and course ..... 735 



443. Inhibitory sweat-nerves 736 



CHAPTER IV. 



THE METABOLIC PROCESSES OF THE BODY. 

 444. The general characters of the metabolism of the body . . . 737 



SECTION I. 

 THE STRUCTURE OF THE LIVER. 



445. The general structure of the liver 739 



446. The structure of a lobule of a liver 740 



447. Glisson's capsule ; the terminations of the hepatic artery . . 741 



448. The structure of the bile ducts 742 



449. The structure of the hepatic cells. Glycogen 742 



450. The arrangement of the cells. The bile canaliculi .... 743 



451. The structure of the liver of the Frog 745 



452. The lymphatics of the liver 746 



SECTION II. 

 THE HISTORY OF GLYCOGEN. 



453. The characters of glycogen 748 



454. The conversion of glycogen into sugar by the liver . . . 749 

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



of glycogen in the winter frog 750 



456. The detailed characters of the hepatic cells in the frog . . . 753 

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



hepatic cells of the frog - . . 754 



