FIG. PAGE FRONTISPIECE, } VISCERA IN POSITION,} 1. Section of bone, 17 2. Structure of bone, magnified, 17 3. The skeleton, 18 4. Cells of cartilage, 20 5. Elbow-joint, 21 6. Spinal column, 22 7. The muscles, 24 8. Muscular tissue, magnified, 25 9. Biceps muscle of the arm, 26 10. View of knee-joint, 27 11. Appliance for strengthening the muscles, 35 12. Appliance for strengthening the muscles, 35 13. Parlor gymnasium, 36 14. Root and transverse section of hair, magnified, 43 15. Granules of potato starch, 61 16. Section of the trunk, 81 17. Section of a tooth, 82 18. Section of the jaws, 82 19. Section of the jaws--right side, 84 20. Structure of a salivary gland, 87 21. Head of a horse, showing salivary gland, etc. 87 22. Section of chest and abdomen, 90 23. Organs of digestion, 91 24. The lacteals, 97 25. Blood corpuscles, 102 26. Blood corpuscles of man and lower animals, 103 27. Circulation of the blood, 108 {10} 28. Heart and large vessels, 109 29. Section of the heart, 110 30. Form of the pulse, 116 31. Valves of the veins, 117 32. Web of frog's foot, magnified, 119 33. Circulation in a frog's foot, 119 34. Organs of the chest, 124 35. Larynx, trachea, and bronchial tubes, 125 36. Diagram of the structure of the air-cells, 125 37. Section of the lungs, 126 38. Section of mouth and throat, 127 39. Ciliated cells, 128 40. Cerebro-spinal system, 151 41. Upper surface of the cerebrum, 153 42. Vertical section of the brain, 154 43. Base of the brain, 155 44. Brain and spinal cord, 156 45. Sense of touch, 185 46. Section of nasal cavity, 193 47. Front view of the eye, 200 48. Vertical section of eye, 202 49. Diagram for blind point of eye, 207 50.