243. What is the cataract? How cured? What is color blindness? Illustrate. What care should be taken of the eyes? Should one constantly lean forward over his book or work? What special care should nearsighted children take? By what carelessness may we impair our sight? 244. How is squinting caused? Cured? What care should be used after an illness? Should we ever read or write at twilight? Danger of reading upon the ears? What course should we take when objects get into the eye? How may they be removed? 245. Are "eyestones" useful? Why should we never use eyewashes except upon the advice of a competent physician? What rule should be observed with regard to the direction of the light when we are at work? Name some causes of near-sightedness. Remedies. 346. Give the account of Laura Bridgman. 347-350. Describe the anatomy of the nose. In what part of the nose is the function of smell performed? Why do we "sniff" when our attention is attracted by an odor? Give some experiments which illustrate the connection between smell, taste, and touch. Why should we retain our food in the mouth as long as possible? Of what use are gastronomic odors? 350. Why should a child's ear never be boxed? Illustrate. How can we detect inattention from deafness in a child? What should we consider in this respect? 351. Why should we avoid direct draughts in the ear? Explain the use of earwax. What common habit is very injurious? Why? 352, 353. What is the office of the Eustachian tube? Illustrate. 353, 354. Describe the action of the "eye curtain." Give experiments. What are "Purkinje's Figures"? Describe experiment. HEALTH AND DISEASE. 251-254. State some of the benefits of health. Contrast it with sickness. How were diseases formerly supposed to be caused? What remedies were used? What does modern science teach us to be the nature of disease? Give some illustrations showing how diseases may be prevented. Is it probable that the body was intended to give out in any one of its organs? What is the first step to be taken in the cure of a disease? What should be the object of medicine? What is now the chief dependence of the best physicians? What do you think concerning the common use of patent nostrums? Ought we not to use the greatest care in the selection of our physician? GLOSSARY. Ab do' men (_abdo_, I conceal). The largest cavity in the body, in which are hidden the intestines, stomach, etc. Ab sorb' ent (_ab_, from _sorbeo_, I suck up). Ac' e tab' u lum (_acetum_, vinegar). The socket for holding the head of the thigh bone, shaped like an ancient vinegar vessel. A ce' tic (_acetum_, vinegar). Ad' i pose. Fatty. Al bu' men (_albus_, white). A substance resembling the white of egg. Al bu' mi nous substances contain much albumen. Al' i men' ta ry. Pertaining to food. Al' ka line (-lin) substances neutralize acids. An' æs thet' ic. A substance that destroys the feeling of pain. A or' ta. The largest artery of the body.