CHAPTER XVII.  THE KIDNEYS AND THEIR WORK.—­What is the work of the kidneys?  How may we keep these organs healthy?  What is the effect of alcohol upon the kidneys?

CHAPTER XVIII.  OUR BONES AND THEIR USES.—­How many bones in the body?  What are the bones called when taken all together?  Name the principal parts of the skeleton.  Name the bones of the trunk, of the arms, of the legs.  What are the uses of the bones?  What is a joint?  What is cartilage?  By what are the bones held together?  Of what are the bones largely composed?

CHAPTER XIX.  HOW TO KEEP THE BONES HEALTHY.—­What sort of bread is best for the bones?  Why?  If a child tries to walk too early why are its legs likely to become crooked?  What are the effects of sitting or lying in bad positions?  Of wearing tight or poorly-fitting clothing?  Of tight or high-heeled shoes?  What injuries are likely to happen to the bones and joints by accident or rough play?

CHAPTER XX.  THE MUSCLES AND HOW WE USE THEM.—­How many muscles in the body?  Of what are the muscles composed?  How are many of the muscles connected to the bones?  To what are all bodily movements due?  How do the muscles act?  What causes the muscles to act?  Do all muscles act only when we will to have them act?

CHAPTER XXI.  HOW TO KEEP THE MUSCLES HEALTHY.—­What makes the right arm of the blacksmith stronger than the left one?  How should exercise be taken?  Mention some things in relation to the use of the muscles which we ought not to do, and state the reasons why.  What is the effect of alcohol upon the muscles? of tobacco? of tea and coffee?

CHAPTER XXII.  HOW WE FEEL AND THINK.—­With what part of the body do we think?  How many brains does a man have?  How is each brain divided?  Of what is the brain largely composed?  Where do the nerves begin?  What is the spinal cord?  Why does it cause pain to prick the finger?  How many kinds of nerves are there? (Ans. Two; nerves of feeling and nerves of work.) Name some of the different kinds of nerves of feeling?  Name some of the different kinds of work controlled by the nerves of work.  Of what use to the body are the brain and nerves?  How does the brain use the nerves?  Of what use is the large brain?  What does the little brain do?  Of what use is the spinal cord?

CHAPTER XXIII.  HOW TO KEEP THE BRAIN AND NERVES HEALTHY.—­Mention some things which we need to do to keep the brain and nerves healthy.  Mention some things which we ought not to do.

CHAPTER XXIV.  BAD EFFECTS OF ALCOHOL UPON THE BRAIN AND NERVES.—­What is the effect of alcohol upon the brain and nerves?  Does alcohol produce real strength?  Does it produce real warmth?  Does alcohol make people better or worse?  What is the effect of tobacco upon the brain and nerves?  Does the use of tobacco lead to other evil habits?  What about the effect of opium and other narcotics?

CHAPTER XXV.  HOW WE HEAR, SEE, SMELL, TASTE, AND FEEL.—­How many senses have we?  What is the ear?  Name the three parts of the ear.  How do we hear?  How should we treat the ear?