148 THE GOVERNOR. 



does not allow a sufficient quantity of gas to come from the gasometers, the 

 gas passes out of the governor into the mains, and in so doing the vessel de- 

 scends, and increases the area of the inlet-pipe, to admit the requisite gas 

 into the mains. 



This action is not influenced by any circumstances connected with pressure 

 or velocity, but is constant and uniform, ensuring at all times a proper and 

 sufficient discharge. 



