THE EMPEROR FOUNTAIN AT CHATSWORTH. 
225 
m, attached to a cog, shuts the water off. The plan of these movements is shown 
at n. In the figure, o is an air-pipe with a rose head and 3 inches in the bore ; 
and p is a continuation of the supply pipe, with the turned and bored joint. 
Figure 2 is a part of the pipe, showing the joint-sockets. All the joints 
(except where flanges were absolutely necessary) are turned and 
! bored; and each of these have joint-sockets, for the purpose 
of extra strength. In this figure, a, a, are the sockets, each in 
1 two pieces ; b, b , the flanges by which they are put together ; 
and c, the turned and bored joint. These sockets are well caulked 
with rope-yarn, and lead run in. 
Figure 3 is the double-acting, conical drop valve, at 181 feet 
distance from the fountain before noticed. The mechanism of 
this valve is on the same principle as the other just described; 
but the double action divides the cur- 
rent of water, and this with the slow 
motion prevents any sudden shock to 
the pipes. The valves «, a , are of 
brass, 12 in. in diameter, and drop 
into brass seatings ; and the passages 
for the divided current, b> b , are to- 
gether of the same capacity as the 
pipe. The motion of the handle, c 
(which is on the top of a neat fluted 
pillar), is communicated by the rod, 
<7, to the cog, e , which works in the 
wheel, f ; the latter being attached 
to the brass female screw, which 
raises the valve-rod, /«, and lifts the 
valves. The arrows show the direction in which the water enters and leaves 
the valve. In consequence of the immense force of the water, it became necessary 
to have the lower end of the pipes well secured ; therefore the lower end to which 
the funnel part is attached, has been cast with a bed-plate and bracket. 
Figure 4 represents this part of the pipe in which a, «, are three heavjr blocks 
of masonry, to which the bed-plate (2 in. thick) is firmly bolted and batted with 
lead, as shown. In this figure, b is the bracket ; c, c , the strengthening bands ; (£, a 
diminished piece of pipe to 12 ins. in the bore ; 0 , the conical or funnel-pipe, with 
flanges at the top, to which the flanges of the brass nozzle, /, are bolted. There 
are various nozzles of 2, 2J, 3, 3J, and 4 in. diameter in the bore, with funnels to 
suit each. The water-line is shown at g. The height from the bed-plate to is 
2 ft. 6 in. ; from h to i , 1 ft. 6 in. ; and from i to k , 4 ft. 8 in. The height of the 
brass nozzle is 5^ in. The whole of this end of the pipe is buried in masonry to 
within a few inches of the surface of the water. 
VOL. xi. — no. cxxx. 
G G 
