2o8 THE HOUSE AND ITS EQUIPMENT. 



favour. Bridge? for small or large streams are economical and durable in reinforced concrete 

 (instruction, either of beam or arched form. 



Shore protection, groynes, conduits, water mains and sewer-pipes are carried out in reinforced 

 concrete on an extensive scale. Fig. 234 shows a reinforced concrete pipe in course of construction. 

 It clearly indicates how the expanded steel sheets are put in position over a timber centre, and how 

 the concrete is applied, the centre being afterwards removed and put in position further along for the 

 next section of the work. Such sewers are very economical. Water mains and culverts for carrying 

 surface water or draining low-lying land are constructed in a similar manner. 



H. KFMPTON DYSON, C.E., Secretary of the Concrete Institute 



