24 ELEMENTS OF PHYSIOLOGY 



13. Which teeth cut like a pair of scissors ? 



14. Why is the outer surface of leather smoother than the inner ? 



15. How long does it take a spot of indelible ink on the fingers to 

 wear off ? Of what does this show the rate of change ? 



1 6. How may indigestion cause the teeth to decay ? 



17. In what respect do patent leather shoes resemble rubber shoes ? 



18. Why is baldness more common among men than among women ? 



19. How do you account for the location and shape of the bald spot ? 



20. When their skins contain the same amount of pigment, a man's 

 complexion is darker than a woman's, because his blood is darker, since 

 it contains ten per cent more red corpuscles. Why do women desire a 

 fair complexion ? 



21. Why is a woman's complexion considered beautiful when it is 

 pink and fair, but ugly when it is pale or sallow ? 



EXERCISE HI 



22. Did you ever know of a case of loss of health caused by chang- 

 ing the warm clothing of daily wear for the thin or scanty dress of 

 a ball or party ? 



23. Why should we remove an overcoat or a cloak when we go into a 

 warm room ? 



24. Why is cold water better than warm water for the daily bath ? 



25. Should a person wait for a warning such as fatigue, depression, or 

 chilly feeling before leaving a bath in the sea or an ordinary bath ? 



26. Why do healthy persons living along the Atlantic, Pacific, or 

 Gulf coasts, have softer skins and fresher, rosier complexions than 

 those who live in the interior of the United States? Why, if they 

 live in forest regions such as Louisiana and east Texas, rather than in 

 prairie regions such as west Texas, Kansas, and Nebraska ? 



27. Why are the complexions of English people fresher and rosier 

 than those of people in the United States ? 



28. Glass allows the radiant heat of the sun to pass through ; wood 

 does not. Why are inside blinds appropriate in cold climates but very 

 unpleasant and inappropriate in warm climates ? 



29. Which are healthier, and in better taste for furniture, in the 

 Gulf States and the West Indies, willow and rattan, or plush and velvet? 



30. Show how the wearing away of the outer cells of the epidermis 

 contributes to the cleanliness of the body. 



