AMERICAN INSTITUTE. 



101 



The Trost cannot heave the hydrants, as the outside case E is detached, and has 

 room to play up and down two inches, thus accommodating itself to the ground 

 without disturbing the hydrant or breaking the connection. 



They are all of iron, and require no wooden boxes. They do not require packing 

 with straw to prevent freezing. They are operated without removing the cap on 

 top, the revolving nut a working the valve-rod C up and down within it. 



In case of any obstruction in the valves, or for repairs, they can be unscrewed 

 from the base or elbow, D, leaving case E undisturbed in the ground, and replaced 

 in a few minutes, requiring no excavating or taking up of pavements or sidewalks. 



They are ornamental and tasty in appearance. With our new style of base (not 

 shown in cut) we get the valves five feet below the surface, running them down to 

 bottom of branch-pipe, giving a very free water-way, and saving from one to one 

 And a half feet depth of excavation in laying branch-pipe. 



