STREET-MAINS. 



163 



The price of Is. 8d. given to the foreman pipe-layer for laying a yard of 

 eighteen-inch pipe, may be divided : 



Digging the trench 



Putting in pipes and making the joints 

 Filling in the ground and ramming down 

 Watching, coals and candles, tolls 



Also the Is. Id. for a twelve-inch pipe : 



Digging the trench 

 Putting in the pipes and making joint 

 Filling in the ground and ramming 

 Watching, coals and candles 



8d. per yard. 



4. 



* 



\s. 8d. per yard. 



6rf. per yard. 



2 

 2 

 3 



)> 

 35 



n 

 n 

 n 



\s. Id. per yard. 



The average weight and prices of socket-pipes will be found as in the follow- 

 ing Table : 



1 



6 



1) 



V' 



n. 



5 



Elastic Joint. 



I will now describe a new method of making joints for gas-pipes, which 

 cannot fail to be tight, which is very much cheaper than the use of lead, and 

 possesses other advantages. 



Let the pipes be placed in the socket in precisely the same way as for a 



Y2 



