158 



TRANSACTIONS OF THE 



per cent, of fresh water to the elevation from which the refuse 

 water is supplied. 



Tliis machine is particularly useful in country places, where 

 there is a limited supply of water. It can be so arranged, that 

 when the house cistern is full, the machine will stop, and allow 

 the spring or reservoir to accumulate its greatest supply. When 

 water is then drawn from the cistern, the pump will commence 

 working, and will continue until the cistern is again full. In this 

 respect it differs from the hydraulic ram, which, when in order, 

 will run constantly, overflowing the cistern and wasting the water 

 of the fountain. 



It is also more useful in tide-water than the ram. It is well 

 known that when a ram is overpowered by the rise of the tide, 

 the water of the spring silently passes through it without effect. 

 This machine, placed in a similar position, will not allow any 

 water to escape, although overpowered, but will cease working 

 until the tide recedes sufficiently to allow it to work to advantage. 

 It will also work with turbid water, and pump up spring water. 



[^ silver medal awarded. 



Hanson's Hydraulic Rams. 



Thomas Hanson, 137 Third avenue, Ne\T-York. 



This invention consists in combining with the cylinder or driv- 

 ing chamber of a water ram and the air vessel thereof, a cylin" 



