HEATING THE HOME II 



the temperature again of the water in the beaker. How much 

 has the temperature changed? What was the source of this 



heat? 



The hot-water system has one great advantage over the 

 steam system in that the water can be heated to any desired 

 temperature and thus can be easily regulated in the mild 

 weather; while in the steam system the water must be 

 heated to the boiling point before any results are obtained, 

 and in mild weather it is difficult to keep the temperature 

 sufficiently low. 



HOME PROJECT i 



Purpose. To make a study of the heating system used in your 

 home. 



Directions, i. If your house is heated by hot air, steam, or 

 hot water, make a careful study of the different parts of the 

 system. Begin with the furnace and notice where the various 

 pipes lead, and trace the circulation of air, water, or steam 

 through the house and back to the furnace. Make a drawing 

 of a section of the house from the garret to the cellar, showing 

 the different parts of the system in their proper position. 



2. Make a study of a cook stove when there is no fire in it, so 

 that it can be taken apart. Make a drawing of a cross section of 

 the stove. Label in the drawing the following parts: ash pan, 

 grate, draft damper, oven damper, oven clean out. By means of 

 black arrows show the path of the smoke and products of combus- 

 tion around the oven and up the flue' when the oven damper is up. 

 By means of red arrows show the path when the damper is down. 

 Notice how the stove may be cleaned out. 



Heating by electricity. The latest improvement in 

 heating is the use of electricity. This method is very con- 

 venient and does away with the smoke and dirt of stoves 

 and furnaces. At present it is just in its beginnings and is 

 now too expensive for common use. In the future, improve- 

 ments will doubtless be made and electricity will be sold at 



