SOME LESSONS ON THE HUMAN BODY 



Pupils not infrequently acquire at school the bad habit of stooping 

 or bending over their books. This strains the eyes by bringing them 

 too close to the print. Twelve inches is about the proper distance. 



Exercises 



1. By what means is a wide variety in movement of hand and fingers 

 secured? 



2. Tell the location, form, manner of growth, and uses of the finger nails. 



3. Name several of the structures within 

 the hand of which something can be 

 learned by inspection though they are 

 hidden from view. 



4. Define (a) tonsillitis; (b) adenoids. 



6. What information concerning the 

 state of one's health can be learned 

 from the appearance of the tongue? 

 In what sense is the tongue an organ 

 of digestion? 



6. Describe (a) the hyoid bone as to 

 its position and use; (b) the pharynx 

 as to position and structure. 



7. Why do the teeth ache? How is nourish- 

 ment conveyed into a tooth? 



8. How does a singer become able to 



produce any note desired in singing PIG. 6. Tests for astigma- 

 and a speaker to utter any desired tism. Hold the cut at a suitable 



sound in speech? 



distance from the eyes and in 



A a good light. Note if the 



9. About what is the diameter of the eye- parallel lines in all directions 



ball (a) side wise; (b) up and down? appear equally distinct. 



By a drawing indicate the relative size 



and form of the upper and lower eyelids as seen when the eye 



is "open." 



10. What usually becomes of the tear-water that drains off into the nose 



through the tear-duct? How are the frequent movements of the eye- 

 lids caused? What is meant by saying that these movements are 

 commonly "involuntary?" 



11. What are common defects in the eyeballas an optical instrument? 



12. What is generally true of the eyesight when it is once harmed by reckless 

 or ignorant use of the eyes? Explain the purpose of the ciliary (sil'- 

 e-ar-e) muscles. State how they become weakened, and how this may 

 be avoided without disuse of the eyes. 



