IN HUMAN PHYSIOLOGY. 185 



1 6. Is there any truth in the proverb that "he who sleeps , 

 dines V 



The proverb expresses the fact that the nourishment of 

 the brain and other parts goes on actively during sleep, 

 they being controlled by the sympathetic nerves 



17. What does a high, wide forehead indicate ? 



It suggests a large brain and a high intellectual 

 power. 



1 8. How does indigestion frequently cause a headache 1 

 Through the action of the sympathetic system. 



19. What is the cause of the f oof s being " asleep ? " 



(See Physiology, page 176, note.) 



20. When an injury to the nose has been remedied by 

 transplanting skin from the forehead, why is a touch to the 

 former felt in the latter ? 



The mind refers the sensation to the place where the 

 nerve naturally had its origin /'. e., the part over which 

 its tiny fibres were originally distributed. 



21. Are closely-curtained windows healthy ? 

 No. They keep out the sun and the fresh air. 



22. Why, in falling from a height, do the limbs instinc- 

 tively take a position to defend the important organs ? 



The reflex action of the spinal cord moves the limbs 

 into a position of defence, the brain having no time to 

 act. 



