46 



HEATING 



the saving of coal. It should be built higher than the 

 surrounding buildings and trees. If it is built on a hill- 

 side it should be higher than a level line across the top of 

 the hill. 



For the heating of a house such as that shown in cross 

 section, on page 38, which is 130 ft. by 30 ft. by 16J/2 f"-> 

 and 9 ft. high at the eaves, it is recommended that as the 

 house would have 5986 sq. ft. of exposed glass, and would 

 require 1730 lineal feet of 4-inch external diameter pipe 

 for a temperature of 50 to 55 deg. at night, with mercury 

 outside at zero; about 12 lines, or 6 lines under each side 

 bench, would be necessary. 



