1822.] 
To the Editor of the Monthly Magazine. 
SIR, 
WILL endeavour, as briefly as 
H possible, to lay before you my 
plan for the condensation of that part 
of the smoke which will escape from 
the horizontal chimney; and, though 
very materially deprived of its inju- 
rious properties, would still be unplea- 
sant. In doing which, I shall proceed 
first to describe the construction of 
the apparatus, and then the mode of 
its operation. With regard to its 
structure, I propose to erect a fire- 
place, composed of strong masonry, as 
nearly square as possible, over which 
is placed, at a proper height, an iron 
boiler, B, flat at bottom, about eighteen 
inches in depth, and perfectly open at 
top; to which is affixed, in a proper 
situation, a ball-cock, F, (Sketch, 
No. 2,) to keep up an equal supply of 
water from a well, pond, or reservoir, 
through the medium of a pipe. The 
flues.of the fire-place under the boiler 
-should have a free communication 
with it, by means of four openings be- 
tween each of the four places of sus- 
pension, H, (Sketch, No. 1,) by which 
it is supported. 
Mr. Rudder’s Plan for the Condensation of Smoke. 
105 
Having proceeded thus far, I pro- 
pose bringing the mouth of the hori- 
zontal chimney, described in my former 
letter, to the edge of the boiler B, (in 
Sketch, No. 2,) over the whole of 
which is erected a cupola C, open at 
the top D, through which is passed an 
iron cylinder E, till it is on a level 
with the edge of the boiler B, when it 
must be made fast, and enclosed by a 
high chimney, which, in conjunction 
with the horizontal chimney H, com- 
pletes the structure. 
No. 1.—Transverse Section of the Boiler 
and Flues of its Fire-place. 
No. 2.—Section of the Metallic Smoke Consumer, §c. 
1. Flues of the fire-place.—2. Wall to support horizontal chimney.—3. There should 
be a door in that or some other situation, for examining the state of the boiler, &c. 
With respect to its application and 
operation: in the first place, let the 
MontHiy Maa. No.372. 
‘poiler B be filled with water, till it is 
within a few inches of the mouth of 
P the 
