138 
Report on Implements at Liverpool., and on 
enable their lift to be adjusted if at any time needful. K is the discharge 
pipe leading downwards for connection with the boiler. L is the suction 
pipe for watei supply, which can either be from a cistern on the ground-level 
or from a height, as circumstances may make most convenient. G is the 
suction air-vessel, through a plug in which the hydrotrophe is filled with 
water at first starting. The small injection pipe M is bent upwards and 
forms a connection between the two chambers ; its pui-pose is to hasten the 
condensation of steam when the hydrotrophe is emj)loyed on a long suction. 
The hydrotrophe may be fixed in any convenient position with respect to 
the boiler, either upon it or at some distance from it ; tlie only necessary con- 
dition being that tlie discharge flange should not be less than eighteen .inches 
above the normal water-level. Steam could be sup])lied through a whcol 
valve screwed into the opening N by means of a pipe taken from any poiii 
well above the water-line; the discharge pipe, to which is connected tin' 
flange P, is to be taken into the boiler at any point well below the water- 
