19. What makes a man "bilious"? 20. What is the best remedy? _Ans_. Diet to give the organs rest, and active exercise to arouse the secretions and the circulation. 21. What is the practical use of hunger? 22. How can jugglers drink when standing on their heads? 23. Why do we relish butter on bread? 24. What would you do if you had taken arsenic by mistake? (See Appendix.) 25. Why should ham and sausage be thoroughly cooked? 26. Why do we wish butter on fish, eggs with tapioca, oil on salad, and milk with rice? 27. Explain the relation of food to exercise. 28. How do you explain the difference in the manner of eating between carnivorous and herbivorous animals? 29. Why is a child's face plump and an old man's wrinkled? 30. Show how life depends on repair and waste. 31. What is the difference between the decay of the teeth and the constant decay of the body? 32. Should biscuit and cake containing yellow spots of soda be eaten? 33. Tell how the body is composed of organs, how organs are made up of tissues, and how tissues consist of cells. 34. Why do we not need to drink three pints of water per day? 35. Why, during a pestilence, are those who use liquors as a beverage the first, and often the only victims? 36. What two secretions seem to have the same general use? 37. How may the digestive organs be strengthened? 38. Is the old rule, "after dinner sit awhile," a good one? 39. What would you do if you had taken laudanum by mistake? Paris Green? Sugar of lead? Oxalic acid? Phosphorus from matches? Ammonia? Corrosive sublimate? (See p. 265.) 40. What is the simplest way to produce vomiting, so essential in case of accidental poisoning? 41. In what way does alcohol interfere with the digestion? 42. Is alcohol assimilated? 43. What is the effect of alcohol on the albuminous substances? 44. Is there any nourishment in beer? 45. Show how the excessive use of alcohol may first increase, and, afterward, decrease, the size of the liver. 46. Will liquor help one to endure cold and exposure? 47. What is a fatty degeneration of the kidneys? 48. Contrast the action of alcohol and water in the body. 49. Is alcohol, in any proper sense of the term, a food? 50. Does liquor strengthen the muscles of a working man? 51. Is liquor a wholesome "tonic"? 52. Is it a good plan to take a glass of liquor before dinner? VII. THE NERVOUS SYSTEM. "Mark then the cloven sphere that holds All thoughts in its mysterious folds, That feels sensation's faintest thrill, And flashes forth the sovereign will; Think on the stormy world that dwells Lock'd in its dim and clustering cells; The lightning gleams of power it sheds Along its hollow, glassy threads!"