106 
ihe cylinder E; then light the fire, G, 
of the boiler, and, when the water has 
attained a considerable degree of heat, 
light that of the smelting eruacu 
so that it may not begin to affect the 
metal before the whole is in complete 
operation. 
On referring to Sketch No. 2, it will 
be seen that the smoke of the smelting 
furnace A, from the fire G, which heats 
the boiler B, and the steam from the 
boiling water, are all brought in con- 
tact; the two former will immediately 
rise to the top of the cupola, from 
whence, findirg no possibility of escape, 
they are thrown back upon the sur- 
face of the boiling water, in order to 
effect their escape through the cylinder 
B, whilst they are opposed in their de- 
scent by the steam, which, by mixing 
with it, immediately condenses it, and 
lodges all the grown particles on the 
sides of the cupola C, while the latter 
effects its escape throngh the cylinder 
E, and the high chimney I, when, 
should any of the smoke be mixed 
with it, it will be condensed by it, and 
fixed on the sides of the latter, long 
before it reaches the mouth. 
Having, as concisely as possible, de- 
scribed my plan, allow me to make a 
few remarks upon the subject. I have 
not in this account given any rules for 
dimensions, as that must entirely be 
regulated by the volume of smoke to 
be consumed, and the number of fur- 
naces with which it may be connected, 
(and I see no reason why it may not 
be connected with several, by having 
these horizontal chimneys to one point ;) 
on which account, it would be useless 
for me to attempt it. There is in this 
plan what I conceive to be a most de- 
sirable convenience, viz. that of ae- 
commodating the length of the hori- 
zontal chimney H to the size of the 
ground occupied by the works. If the 
ground be not of dimensions to allow 
of the horizontal chimney being car- 
ried of sufficient length,—in which 
case the volume of sulphureous and 
bituminous smoke would be greater, 
and perhaps too much for it to destroy 
perfectly,—by making use of the ma- 
chine used for consuming the bitumi- 
nous smoke of steam-engines to the fire 
which heats the boiler, the whole power 
of the steam might be employed against 
the metallic smoke, of which, 1 have 
no doubt, it will be found capable of 
destroying any quantity. Again, if 
not confined for room, the greater 
length the horizontal chimney is car- 
Mr, Rudder’s Plan for the Condensation of Smoke. 
[Sept. 1, 
ried, the less the steam will have to 
contend w ith, and the more complete 
its effects. 
This plan, which I ae thus sub- 
mitted to the public, will be found, I 
have no doubt, to be very short of per- 
fection, as nothing but experience and 
experiment can establish its utility ; 
but, allow me to say, 1 have tried the 
experiment myself, and have found it 
to have the effect described, viz. the 
destruction of the smoke. I have not 
been content with one trial only, but 
have repeated it several times, in the 
presence of some scientific gentlemen, 
and its effects which they witnessed 
have been uniformly the same, and I 
have no doubt as to its being found 
extremely useful in the destruction of 
metallic smokes of all descriptions, 
and may, I think, be very generally 
applied. One thing it may be neces- 
sary to observe before closing this 
paper, which is, that the draught of 
the chimney will not be impaired by 
this contrivance. 
I must, however, apologise for hav- 
ing taken up so much of your yalua- 
ble work, and close by observing, 
that, should this meet the cye of any 
of the committee alluded to in my 
former letter, I shall feel happy should 
any thing advanced in this be the 
means of affording any additional 
assistance towards the advancement 
of the very desirable object they have 
in view, the accomplishment of which 
will be viewed by no one with more 
satisfaction than myself. 
Frederick-place; KE. W. Rupper. 
June 15, 1822. 
N.B.—May not the water contained in 
the boiler, after being exposed to the ac- 
tion of the metallic smoke, be turned to 
some profitable account ? 
—— 
To the Editor of the Monthly Magazine. 
SIR, 
S your Magazine is open to every 
thing useful to the public, you 
will readily insert this, to show at 
what a trifling expense the nuisance 
arising from melting fat, kitchen-stufl, 
&c. may be got rid of. Forsome years 
it was a subject of complaint against 
me by my neighbours, nor could E hear 
of a remedy; at length the idea sug- 
gested itself to me, and for two years 
or more I made use of the plan, in a 
temporary way, in wood: I have now 
adopted it in iron and bricks, at the 
trifling expense of a few pounds, with 
complete success, not the least offen- 
sive 
