BLACK EYES. 191 



of the skin, and converts it to sensible 

 heat and perspiration. 



Q. Why does the WHITE EUROPEAN SKIN 

 BLISTER and SCORCH when exposed to the hot sun ? 



A. Because the white will not absorb 

 the heat; and, therefore, the hot sun 

 rests on the surface of the skin, and 

 scorches it. 



Q. Wliy has a NEGRO BLACK EYES ? 



A. The black colour of a negro's 

 eyes defends them from the strong light 

 of the tropical sun. If a negro's eyes 

 were not black, the sun would scorch 

 them, and every negro would be blind. 



Q Why is WATER KEPT COOLER fin summer 

 time) in a BRIGHT TIN POT, than in an EARTHEN 

 one ? 



A. Because bright metal will not 

 absorb the heat of the summer sun, like 

 an earthen vessel. 



Q. Why is BOILING water KEPT HOT in a 

 BRIGHT TIN VESSEL longer, than in an earthen 

 one? 



A. Because bright tin will not suffer 

 the heat of the boiling water to escape in 

 rays, as an earthen vessel does. 



