Water-'pipes arid Syphons Jron disengaged Air, S^c. 107 



Fig. 1. Fig. 2. 



AB is a cylindrical vessel of iron, lead, or copper, divided into 

 two equal spaces by the false bottom a, b, containing the air-tight 

 valve c ; the lower bottom d, e, contains a similar valvey,* and, in 

 order that this valve may be accessible for being cleared or re- 

 paired when necessary, the bottom plate containing it may be 

 made to screw into the cylinder. To the under side of the valve 

 yis fixed the vertical pipe C, of such length as may be necessary 

 to connect it with the syphon or water-pipe to which it is to be 

 applied (see fig. S and 3). An upright pin p, q, fixed in the top of 

 these valves, passes through oblong holes in the sliding brass 

 rods gh, ik, which work horizontally, passing through water- 

 tight leather collars in the stuffing-boxes I, m, in the sides of the 

 cylinder, and through holes in the knee-plates n, o, fixed to the in- 

 terior opposite side, by the alternate motion of these rods the 

 valves are opened and shut. A simultaneous alternate motion 

 is given to these rods by the lever h, r, k, turning on its center r 

 on a pillar r, s, fixed on the side of the cylinder ; and, by means 

 of vertical hinge-joints in the rods at t, w, their free parallel mo- 

 tion is secured. In the position of the lever represented in the 

 figure, the valve e is shut and the valve^open ; by a small turn 

 of the lever into the^direction /,47, the valve y is shut, and tlie 

 vaVo e open?('. 



