AMERICAN INSTITUTE. 151 



(MACHINERY No. 5.) 



HYDRAULICS. 



West's Improved Pump. 



Gay & West, US Maiden Lane, New-York. 



It is commended for its extreme simplicity of construction, 

 great strength and consequent duralnlity, and clieajiness of repair. 

 Althougli it lias Init two valves necessary to its action, (an addi- 

 tional foot-valve being put in for greater security,) it is perfectly 

 double-acting, tlirowing a continuous stream, with great force. 

 There is no stufl&ng box in this pump — tlie jjressure being held 

 by a cup packing, like that upon the working piston, working in 



West's iLupiovcd I'liuip. 



