112 MICROBES AND THE MICROBE-KILLER. 



body. And, second, it must be perfectly harmless, so 

 that it can be used in large doses, like water, to soak 

 the whole system continually for any length of time. 

 Then fermentation is bound to cease, and during all 

 this time the stomach of the patient becomes gradually 

 renewed, appetite returns, and blood, color, and flesh 

 will form again. 



To keep the roots warm and tops cool, plenty of fresh 

 air, sunshine, warmth, and moisture is essential for the 

 growth of plants. The same can be said of man. Keep 

 the feet warm and the head cool, get plenty of fresh air, 

 sunshine, healthy food, and sufficient exercise to keep 

 the blood in circulation. 



The man who works, walks, runs, or exercises gene- 

 rally, keeps healthy and has a good appetite, providing 

 he has health to begin with. But the man who sits 

 still, takes little or no exercise, but eats almost as much 

 as the man who exercises, and drinks in the same pro- 

 portion, soon gets sick and loses his appetite. The 

 faster we walk or exercise the more air we breathe. 

 The inflation of the lungs causes a constant movement 

 of the stomach. This corresponds to the action of the 

 suckers in plants, acting as scissors to cut and grind the 

 food taken in. 



A glance at the photograph, which is a transverse sec- 

 tion of the stomach (see Plate V.), will explain that 

 when the stomach is full of food every breath causes the 

 lobes to grind against the food. The more we exercise 

 the sooner and better the food is digested. It is thus 

 that we feel hungry much sooner after exercising than 

 when we do not exercise. During sleep we breathe 

 slowly, hence hunger is not so noticeable then. In the 

 healthy stomach the food is digested or prepared for 

 further digestion before it gets time to ferment, but in a 

 stomach which is not healthy it ferments because the 

 process of digestion is much delayed. 



Florists know that to raise perfect flowers and 

 healthy, green-looking plants they must encourage the 

 roots, feed them well, and keep them healthy. The top 



