THIRD GRADE WINTER WORK 155 



touch the body. Discuss the use and dangers of this power 

 of the skin. 



The sense of touch is located in the skin, also. It is most 

 sensitive in the fingers and in the tip of the tongue, where it 

 is most used. Give the pupils practice in distinguishing 

 things through their sense of touch. 



LESSON XXIX 

 HEATING OUR HOMES 



How do we keep warm in the winter? How do we keep 

 out the cold from our homes ? What is used as fuel ? Dis- 

 cuss coal, wood, coke, charcoal, oil, and gas, as fuels, and 

 how each is used. 



Make a special study of a stove. Name and explain the 

 uses of all its parts, e.g. the legs, ash pan, grate, fire box, 

 damper, doors, openings in the doors, the stovepipe, chim- 

 ney, etc., and, if it be a cooking stove, discuss also the 

 oven, lids, the space around the oven, how and why it is 

 cleaned, etc. 



If the schoolhouse has a steam- or water-heating plant, 

 visit and study it. Follow the heat from the boiler to the 

 schoolroom. Note how the fresh air is introduced and 

 heated, and how the temperature in each room may be regu- 

 lated. 



Study a grate, range, furnace, hot-blast stove, etc., and 

 compare corresponding parts with the stove first studied. 

 Notice particularly in each case how the supply of fuel and 

 air is regulated and the effect of increasing or diminishing 

 either upon the amount of heat produced. 



A common coal oil lamp has all the essential parts of a 



