178 



PHYSIOLOGY AND TEMPERANCE. 



sleep when tired. A plucky lad may outdo his strength, and 

 bring on illness, in his ambition to excel at some muscular 

 feat, or overcome his fellow in some game or sport. The 

 satisfaction of defeating an opponent at lawn tennis, or the 

 desire to carry off some trophy, may goad a young girl or an 

 ambitious youth to physical harm. The imprudent efforts of 



people of middle and advanced 

 age to appear young, to run to 

 " catch " the train or street car. 

 or show their agility in other 

 youthful ways, have often caused 

 sudden and serious results. 



5. Necessity for Exercise. 

 Children when deprived of suf- 

 ficient out-door exercise are gen- 

 erally ale, puny and delicate. 

 Nothing weakens the young body 

 like an in-door, inactive life. It 

 makes a child tender and suscep- 

 tible to the slightest change of 

 weather. Colds, coughs and head- 

 aches are quite common. Chil- 

 dren of the working-classes are 

 usually strong and healthy. They 

 may not be well clad, perhaps 

 they are often dirty, but they 

 have the freedom of the lanes, 

 the fields and the streets, and spend the greater part of the 

 day in the open air. 



The development of the child's body from day to day calls 

 for close attention to its many requirements. Proper nourish- 

 ment must be supplied and suitable clothing provided. The 

 child must be taken out into the fresh air, and directed and 

 encouraged in those efforts of physical exertion which tend to 

 strengthen the system and hasten its growth. 



FIG. 52. Curvature of Spine. 



