BIOLOGY AND HEALTH 439 



4. Ventilation. 



Essentials for proper ventilation. 

 Dust removal. 



5. Care of the eyes. 



Have frequent examinations. 



Provide proper light, not too bright. 



Avoid shiny papers. 



Avoid continued severe use, producing fatigue. 



Avoid reading in failing evening light. 



Serious troubles follow abuse of eyes. 



6. Hygiene of bathing. 



Hot baths for decency and cleanliness 



not to ""open the pores " 



not too frequently 



best at bed time to avoid chilling 

 Cold baths to train body against chilling 



should be followed by rubbing and "glow " 



best taken in morning 



not too cold nor too prolonged. 



7. Care of the teeth. 



Conditions in mouth favor bacterial growth. 



Harm to teeth from bacteria, decay and loss. 



Other damage to health and looks, due to poor teeth. 



8. Hygiene of the feet. 



Danger from improper shoes. 

 Shape and material of shoes. 

 Correct habits of walking. 

 Support of the arches of the feet. 



9. Correct posture. 



Standing position. 

 Sitting position. 



10. Hygiene of the nervous system. 



Great development of nervous system. 



Possibility of over strain and neglect of rest of body. 



Importance of well-trained brain. 



Importance of sleep. 



