102 PHYSIOLOGY AND TEMPERANCE. 



material after the cells composing the body have received 

 what they require for their growth and development, which 

 form a large part of the fuel of the body. The broken- 

 down cells which have formed a part of the living structure, 

 like a worn-out building, may be still used as fuel, but at 

 the same time we know that when much heat is carried 

 off from the body, as in cold climates, there is a desire 

 for carbonaceous food. 



While the lungs are not the source of heat, they are the 

 portal by which the oxygen necessary for combustion enters 

 the body, and if the lungs fail in their duty the supply of 

 heat to the body is affected. See how a brisk walk in the 

 open air, by producing a more rapid breathing, starts the 

 flame of life into a greater glow. 



11. The Need of Clothing. The production of heat 

 in the body, and its loss by radiation, etc., are so evenly 

 balanced that the internal temperature in health varies but 

 a trifle. A man may travel from the extreme north, where 

 it is intensely cold, down to the hot climate of the Equator, 

 and not vary one degree of heat within his body The ther- 

 mometer will register close upon the normal heat, which is 

 98f F. We wear clothing to help in adapting ourselves 

 to the varying climates. In cold climates, plenty of warm 

 woollens and furs are needed to prevent the body-heat from 

 escaping. In hot climates, light goods open in texture are 

 more suitable, because they help to conduct off the body-heat, 

 while they protect the skin from the rays of the hot sun. 



12. Effects of Alcohol on Respiration. When speak- 

 ing of the effects of alcohol on the skin, we noticed that it 

 caused a dilatation of the capillaries all over the system. 

 We are now able to understand what this means with regard 

 to the lungs. A dilated condition of the almost endless 

 number of capillaries surrounding the thousands upon thou- 

 sands of air cells would mean the loading of the lungs with 



