Introduction^ 163 



injury need ever come from hot steam pipes, in this (connection 

 it may be said that hot water for forcing establishments is most 

 satisfactory when conducted in wrought-iron or gas pipes, in 

 essentially the same manner as steam. It remains to be said ihat 

 in all our houses, comprising over 6,000 square feet and described 

 in the sequel, we shall in the future use steam heat from a hori- 

 zontal tubular boiler. 



L. H. BAILEY. 



