for liaising Water . %*f 
Its simplicity* you are welcome to make it public by means 
of the Emporium. Though both the principles of it are 
old enough* yet I never have seen them combined before. 
I. B. 
Or. Coxe. 
AB (plate I. tig. 1.) is a box made of thin planks* 
which* together with its two tubular arms BC and BO* is 
moveable about the centres Gr and H. At the extremity of 
each arm is a hole* as E* of such a size that the quantity of 
water discharged by both* shall be less than that which falls 
through MM : the tube AB will therefore be constantly full. 
II is the axis of the whole* fastened to the interior of AB. 
At I is a perpetual joint, with the upper axis of which is 
connected the cylinder ST* with a tube coiled round it* so 
as to form a screw 7 of Archimedes. The cylinder is pre- 
vented from slipping downwards by a shoulder on its 
axis at' a, and is moveable on the centres a and h. 
The action of the machine* which is easily understood* 
is as follows : The water hows through HP* which is 
connected with the stream by means of a pipe* into the 
box X until it fills it as high as K. It then continues 
its course through the tube EXMN* and falls into the 
box AB. As the holes E and F discharge less than 
the quantity of water which flows into AB* it will soon 
become full* when the water rushing out at the two holes 
will cause* by its reaction* the arms* and of course the 
box AB* to move in a retrograde manner. The axis H 
revolving also turns the cylinder ST* at every revolution 
of which the orifice of the pipe c descends into the water 
X* takes in a small portion* and as the whole turns* 
raises it gradually to the top* where it is discharged at U* 
and carried off by the pipe W. 
The cylinder may be prolonged to any height desired* 
but it is evident that the longer it is* the smaller must be 
