PROBLEM 5. How the Body Gets Rid of Wastes 245 



temperature will fall. When the wet bulb thermometer stops falling, 

 note its temperature. What is the difference between its reading and the 

 dry bulb reading? With the dry bulb reading and the difference in 

 temperatures, you can find the percentage of moisture (relative humidity) 

 in your room by consulting a relative humidity table. 



2. By preparing a large thermometer containing alcohol with a little 

 red ink in it, you can demonstrate to the class the effect of evaporation on 

 the temperature of an object. What else must be done in this experiment? 



3. Look up and report on methods of air conditioning. 



