LIST OF ILLUSTRATIONS. 



FIG. PAGE 



1. Vegetable Cell. (DUVAL) 6 



2 Cell with Reticulum of Protoplasm Radially Disposed, From Intestinal Epi- 

 thelium of a Worm. (CARNOY) 8 



3. Amoeba proteus. (LEIDY) 9 



4. To Show the Changes in the Nerve-cell Due to Age. (From HOWELL) 23 



5. Yeast Fungus. (After HARLEY) 28 



6. Specimens of Milk Viewed through the Microscope. (LANDOIS) 41 



7. Longitudinal Section of a Molar Tooth of Man. X 8. (SOBOTTA) 52 



8. Portion of the Crown of a Longitudinal Section of a Human Premolar. X-200. 



(SOBOTTA) 53 



9. Portion of a Longitudinal Section of the Root of a Human Molar Tooth. X 200. 



(SOBOTTA) 54 



10. Histology of the Salivary Glands. (LANDOIS) 55 



11. Parotid of Cat. (L. MULLER) 64 



12. Parotid of a Rabbit in Fresh State. (LANGLEY) 65 



12a. Schema of Nerves of Parotid Gland 66 



12b. Schema of Nerves of Submaxillary Gland 67 



13. Human Stomach. (After SAPPEY) , 70 



14. Vertical Section through the Gastric Mucous Membrane. (LANDOIS) 71 



15. Gastric Contents. Collective Microscopic Picture. X 350. (LENHARTZ) 72 



15a. Functional Division of Stomach. (HUTCHISON) 73 



16. Hourly Variations of the Secretion of Gastric Juice in the Dog after a Meal of 



Meat, Bread, and Milk. (PAWLOW) '... 78 



17. Hourly Variations of the Digestive Power of the Gastric Juice in the Dog after 



a Meal of Meat, Bread, and Milk. (PAWLOW, GLEY) 79 



18. Dog's Stomach. (PAWLOW) 81 



19. Dogs to whom a Fictitious Meal is Given. They have, a fistula in the oesoph- 



agus and a fistula in the stomach. After a photograph taken in the labora- 

 tory of Pawlow. (GLEY) 83 



20. Portion of the Wall of the Small Intestine Laid Open to Show the Valvula? 



Conniventes. (BRINTON, RAYMOND) 90 



21 Blood-vessels of an Intestinal Villus. (LANDOIS) 91 



22. Mucous Membrane of the Jejunum, Highly Magnified. (Schematic.) (TESTUT, 



RAYMOND) , . 92 



23. Effect of Albumose, increasing Peristalsis ." 96 



24. The Pancreas. (Posterior View.) (BOURGERY) r . 97 



25. Schematic Section of Pancreas. (VIALLETON) 98 



26. Pancreas of Rabbit Observed During Life. (KUHNE and LEA) 99 



27. Hourly Variations of the Pancreatic Secretion after a Meal of Meat, Bread, and 



Milk. (After a curve obtained in the laboratory of Pawlow by one of his 

 pupils, A. WALTHER) 100 



28. Liver of Man. (DUVAL) 109 



29. Diagrammatic Representation of an Hepatic Lobule. (LANDOIS) Ill 



30. Glycocholic Acid. (DUVAL) 114 



31. Taurin. (DUVAL) 115 



32. Crystals of Cholesterin. (DUVAL) 117 



33. Curves Showing the Velocity of Secretion of Bile into the Duodenum on (1) 



a diet of milk, uppermost curve; (2) a diet of meat, middle curve; (3) a 

 diet of bread, lowest curve. The divisions on the abscissa represent inter- 

 vals of thirty minutes; the figures on the ordinates represent the volume 

 of secretion in cubic centimeters. (HOWELL, after BRUNS) 118 



34. A, Liver-cells during fasting. B, Cells filled with Glycogen. (HEIDENHAIN). . 121 



35. Aspect of an Intestinal Loop before and after Section of its Nerves. (ARMAND 



MOREAU, after GLEY) 127 



36. Stool. Collective Microscopic Picture. X 350. (Partly after NOTHNAGEL) 



(LENHARTZ) 129 



37. Inhibitory apparatus of Ano-spinal Center - 131 



37a. Rhythmic Systolic Movements of Anal Sphincter of cat after Transverse Sec- 

 tion of Lumbar Part of Spinal Cord. (OTT, from LUCIANI) 132 



38. Osmometer. (COHEN) -138 



38a. Schema Showing Routes by which the Digested Foods Reach the Blood. 



(MORAT) 143 



39. A, Section of Villus of Rat killed during Fat Absorption. (SCHAFER.) B, 



Mucous Membrane of Frog's Intestine during Fat Absorption. (SCHAFER). 147 



40. Lacteals of a dog during Digestion. (COLIN) 149 



41. The Superficial Lymphatics of the Internal Surface of tne Lower Limb. 



(SAPPEY) 150 



(ix) 



