1 10 SMALL WATER SUPPLIES. 



supplied, a means of quickening the cycles is pro- 

 vided and the output increased. The author said it 

 had been found convenient to replace the vessel E by 

 two vessels, one for air and one for gas, so as to keep 

 the constituent parts separate until they entered the 

 combustion chambers. If the first portion of the 

 outstroke of the water column were allowed to re- 

 ject the surplus air and gas back to the sources of 

 supply, then the action throughout the cycle was 

 precisely that described when using the single vessel 

 E, except that a larger portion of the total energy was 

 absorbed in the compression of air and gas ; but the 

 excess was given out during the expansion of the 

 pre-compressed charge in either A or B. The chief 

 advantage pointed out for this system was the more 

 rapid working, as there was no longer any need to 

 wait for the water level in A and B to fall under the 

 action of gravity when the charge was being taken 

 in. In fact, the appliance became practically inde- 

 pendent of the water level on the supply side. The 

 1000 horse-power pump now being built in Germany 

 will operate in the manner described, and the pump 

 will require no more space than a 1000 horse-power 

 tandem engine 



The drawings are merely explanatory diagrams 

 and are not intended to give details. 



