198 RADIATION. 



A. Because the heat of the water 

 flies off so quickly through the dull black 

 surface of the tea-pot, that the water is 

 rapidly cooled, and will not "draw" the 

 tea. 



Q. Do not pensioners, and most aged cottagers, 

 prefer the little BLACK EARTHEN TEA-POT to the 

 bright METAL one ? 



A. Yes ; because they set it on the 

 hob "to draw;' 1 in which case, the little 

 black tea-pot will make the best tea. 



Q. Why will a BLACK TEA-POT make better 

 tea than a bright metal one, if it be set upon the 

 HOB to DRAW ? 



A. Because the black tea-pot will 

 absorb heat plentifully from the fire, and 

 keep the water boiling hot: whereas, a 

 bright metal tea-pot (set upon the hob) 

 would throw off the heat by reflection. 



Q. Then sometimes a BLACK EARTHEN tea-pot 

 is the best, and sometimes a bright METAL one ? 



A. Yes; when the tea-pot is set on 

 the hob " to draw," the black earth is the 

 best, because it absorbs heat : but when 

 the tea-pot is not set on the hob, the 

 bright metal is the best, because it 



