CHAPTER V. UNHEALTHFUL FOODS.—­Is the flesh of diseased animals good for food?  What can you say about unripe, stale, or mouldy foods?  What is adulteration of foods?  What foods are most likely to be adulterated?  Are pepper, mustard, and other condiments proper foods?  What about tobacco?  What is the effect of tobacco upon boys?

CHAPTER VI.  OUR DRINKS.—­What is the only thing that will satisfy thirst?  Why do we need water?  How does water sometimes become impure?  What is the effect of using impure water?  What are the properties of good water?  Are tea and coffee good drinks?  How is alcohol made?  Give familiar examples of fermentation.  How are pure alcohol and strong liquors made?  Is alcohol a food?  Why do you think it is a poison?  Do you think moderate drinking is healthful?

CHAPTER VII.  HOW WE DIGEST.—­What is digestion?  What is the digestive tube?  Name the different digestive organs.  How many sets of teeth has a person in his lifetime?  How many teeth in each set?  How many pairs of salivary glands?  What do they form?  What is the gullet?  Describe the stomach.  What is the gastric juice?  How long is the intestinal canal?  What fluid is formed in the intestines?  Where is the liver found, and how large is it?  What does the liver produce?  What is the gall-bladder, and what is its use?  What does the liver do besides producing bile?  What and where is the pancreas?  What does the pancreas do?  Where is the spleen?  How many important organs of digestion are there?  How many digestive fluids?

CHAPTER VIII.  DIGESTION OF A MOUTHFUL OF BREAD.—­Name the different processes of digestion [mastication, action of saliva, swallowing, action of stomach and gastric juice, action of bile, action of pancreatic juice, action of intestines and intestinal juice, absorption, liver digestion].  Describe the digestion of a mouthful of bread.  Where is the food taken after it has been absorbed?  What are the lacteals?  What is the thoracic duct?

CHAPTER IX.  BAD HABITS IN EATING.—­What is indigestion?  Mention some of the causes of indigestion.  How does eating too fast cause indigestion?  Eating too much? too frequently?  Irregularly? when tired?  How do tea and coffee impair digestion?  Why is it harmful to use iced foods and drinks?  Why should we not eat pepper and other hot and irritating things?  How should the teeth be cared for?  How does tobacco-using affect the stomach?  What dreadful disease is sometimes caused by tobacco?  How does alcohol affect the gastric juice? the stomach? the liver?

CHAPTER X. A DROP OF BLOOD.—­What does the blood contain?  How many kinds of blood corpuscles are there?  What work is done for the body by each kind of corpuscles?

CHAPTER XI.  WHY THE HEART BEATS.—­Where is the heart?  Why does the heart beat?  How many chambers has the heart?  What are the blood-vessels?  How many kinds of blood-vessels are there?  Name them.  What is the difference between venous blood and arterial blood?  What change occurs in the blood in the lungs?  What is the pulse?  How much work does the heart do every twenty-four hours?  What are the lymphatics?  What do they contain, and what is their purpose?  What are lymphatic glands?