APPENDIX F 275 



4. Under the radiator, place a pan as deep as the radiator 

 will allow and large enough so that it comes to the front. Ordinary- 

 dripping pans will do excellently. Fill them with water morning and 

 evening. 



5. Gather the cloth together at the bottom so that it will lie in the 

 pan, and spread it out at the top. 



6. From time to time it is well to wash the curtains, for otherwise 

 they lose the power of absorbing water. If your walls are cold, it may 

 be a wise precaution to place oilcloth behind each radiator to prevent 

 possible injury from the condensation of moisture. 



When the pans are filled with water, the absorbent cloths will draw 

 the water up, thus giving a large evaporation surface. The air that is 

 heated by the radiator naturally moves upward, and the movement is 

 greatest back of the radiator. Thus there will be a constant current 

 of warm air moving along the surface of the cloth and causing abun- 

 dant evaporation. 



This simple contrivance gives all the humidity required at a very 

 small cost. In using it, remember that if you succeed in getting much 

 moisture into the air, you must avoid letting the room get too hot ; not 

 over 65°. If the room gets up to 70° or over, the humidity makes the 

 air uncomfortable and when the room cools down, a little of the moist- 

 ure in the air may condense and harm the wall paper. 



B. Houses Heated by Hot- Air Furnaces 

 Method I. For registers near the wall or in protected parts of the 

 room: 



1. Lift up the iron grating of the register. 



2. On the floor beside the register, lay a piece of stiff oilcloth a 

 little smaller than the grating. Put it on the side next the wall and let 

 the edge project an inch over the opening of the register. The oil- 

 cloth is designed to protect the floor and also to keep the wet cloth off 

 the metal parts of the register. 



3. Put a brass bowl, or other dish of water, close to the register on 

 the oilcloth. 



4. Put the end of a piece of absorbent cloth into the bowl 

 and weight it down so that it will not pull out. Spread the other end 

 over the edge of the oilcloth and let it hang down a foot or more into 



