MECHANICS. 



421 



A Water-mill, invented by Dr. Barker, that has neither 

 Wheel nor Trundle. 



This machine is represented thus, in which A is a 

 pipe or channel that 

 brings water to the 

 upright tube B. The 

 water runs down the 

 tube, and thence into 

 the horizontal trunk 

 C, and runs out 

 through holes at d 

 and e near the ends 

 of the trunk on the 

 contrary sides there- 

 of. 



The upright spin- 

 dle D is fixed in the 

 bottom of the trunk, 

 and screwed to it be- 

 low by the nut g; and 

 is fixed into the trunk 

 by two cross bars at 

 f: so that, if the tube 

 B and trunk C be 

 turned round, the 

 spindle D will be 

 turned also. 



The top of the spindle goes square into the rynd of the 

 upper mill-stone H, as in common mills ; and, as the trunk, 

 tube, and spindle turn round, the mill-stone is turned round 

 thereby. The lower, or quiescent mill-stone is repre- 

 sented by /; and K is the floor on which it rests, and 

 wherein is the hole L for letting the meal run through, 

 and fall down into a trough which may be about M. 



