HOW HEALTH D0E3 ITS WORK 57 



fast and may jump the track if the curves are too sharp. If 

 there is not enough steam in the cylinders, as happens when people 

 feel depressed, the engine cannot start on a grade, and the eco- 

 nomic force of poor crops or of a scanty supply of ocean tonnage 

 causes the train to slip back a bit on the rails. What we need is 

 steady good health, such as prevails more commonly in England 

 than here. If health varies greatly, and if elation and depression 

 are consequently the rule, we may look for financial inflation and 

 depression such as we have in this country, or for alternate waves 

 of revolutionary zeal and dull reaction such as occur in Russia. 

 A steady hand is needed on the valve of health which turns on the 

 steam of human energy. 



