1822.] 
the most favourable in its formation, being 
very open and much wider than the flues. 
He argnes further, flat the construction 
of.a smelting furnace is calculated to in- 
crease a draught tothe utmost, whilst that 
of a calciner is calculated to’ check its 
direct velocity, because an intense heat 
would be improper for that part of the 
process. Now the-calciner at Cadoxton 
became so hot, when the fire for drying 
the flues was at its-height, that the doors 
were red hot,—a degree of heat far too 
great for calcination, and this too, let it 
be observed, with your own coal*, which 
would do nothing with the old flues, and 
which the copper works could not use 
withouta mixture of bituminous coal.” 
As to the objection on account of the 
newness of the flues, I cannot refuse my 
assent to the argument with which it is 
rebutted by the superintendant: he says 
the flues had smoke from a roaring furnace 
passing through them for 48 hours before 
‘they were used in the experiment, being 
composed of bricks and thin tile-stone; 
the former only on edge, and with no 
more mortar between them than serves to 
close the interstices ; such a process would 
be likely to exhaust a large portion of 
their moisture, Then, as for the new lime, 
that ‘also was become nearly dry, and was 
in too’small a quantity to produce any 
specific effect. Then we come to the facts 
developed ‘on inspecting the flues: they 
were coated with the matters deposited, 
consequently the surface of this coating 
could not be affected by the substances 
* The coal here alluded to is a sort of 
inferior ¢nlm, fit for little else than lime- 
burning : it has little or no binding quality, 
and willnot coke; so that without a mix- 
tare’ of binding coal it has always been 
considered unfit for the copper-smelter. 
Commercial Report. 
361 
beneath the substratum of deposit ; hows 
ever, those and all other objections ought 
to be fairly met, and this can be done only 
by a perseverance ‘in the experiment. We 
have spoken to several intelligent gentle- 
men, who will’come and give us their re- 
marks on the next calcination. 
From this report there appears good 
reason for believing that the principles, ex- 
emplified by this experiment, will put an 
end to a nuisance more destructive to 
animal and vegetable life than any other 
existing in this kingdom, ; 
The deposit from the regular copper- 
works in the neighbourhood of Swansea 
and. Neath (in which many chaldrons of 
coals are consumed every hour, day and 
night, throughout the year) must be im- 
mense, and it will be matter of curious 
enquiry whether this deposit may. not be 
turned to profit by the manufacturers. It 
has heen found to yield by analizing three 
per cent. of fine copper and thearsenic, sul- 
phur, and other substances which abound 
in copper ore may possibly be made pro- 
fitable ; even the spare heat on so large a 
surface as these horizontal flues cover may 
present a climate for trades requiring a 
moderate degree of heat, or for hot honses, 
glass frames, &c. ‘Time will probably 
develope great improvement in this branch 
of trade, which has remained stationary 
perhaps for a century past. 
This short description, however im- 
perfect or unscientific, is submitted on the 
impression raised by the reports referred to, 
for the purpose of inducing intelligent and 
scientific men to turn their- minds to this 
very interesting subject. The mischiefs 
produced by the present system of smelt- 
ing copper can scarcely be conceived by 
a stranger unacquainted with its destruc- 
tive Conseqnences. 
MONTHLY COMMERCIAL REPORT. 
PRICES or MERCHANDIZE. 
Cocoa, W.I.common --#3 0 0 to 4 
Coffee; Jamaica, ordinary 5 4 0 — 5 
Cofiee, ————, fine --+ 610 0 — 6 
———, Mocha's-s+%60612 0 0 — 18 
Cotton, W«I.common-- 0 0 8 — 0 
ry Demerara--++e2 O 0 YA— O 
Currants -+-+--.- reeeee 510 0 — 5 
Pigs, Turkey pepe ries oe SB OY en 4 
Plax, Riga -+-+-.<80005 55.0 0 — 0 
Hemp, Riga, Rhine .»-» 52.0 0 — 53 
ps; new, Pockets.+.. 3.0 0 — 4 
7 ,Sussex,do, 3 5 0 — 5 
Iron, British, Bars +--+ 8 0.0 — 8 
T y Pi esvrees 5 O O — 6 
Gi Rastirs sndnere 39.0 0— O 
—,,Galipolicess.seess++ 66 0 0 — 0 
Rags sctiimdne waxmane nytt, 05i—<e2,0 
Raisins, bloom or jaryncw 3.14 0 — 4 
Rice, Patna kind .-.--. 014 0 — O 
——., East India......5. 010 0 — O 
Mon’razty Mac, No, 367. 
— 
March 22. 
April 26. 
“0 0 3.9 0 — $3 15 0 perewt. 
70} 5 2 0 5 & 0. do. 
18 0} 510 0 — 512 0 do. 
0 0413 0 0.—20 0 0. do. 
0 9%} 0 0 8)— O 0° 9%per lb. 
1 07) 0 0 98-0 1, 04-do, 
15. 0 513 0 — 0.0 0 perewt. 
8 0) 3 0 0 =. 4 8 0. do. 
0 0 00 0 — 0 0 Oper ton. 
o 0; 0 0.0 — 0.0.0. do. 
10. 0°} 3 5 O--—5 OO perewt. 
0 0} 215-0 — 8B 0.0 do, 
10 0} 8 0 @ — 8 10.0 per ton. 
19 0} 5.0 0.—' 610 0. do. 
0 0+} 39.0.0 — 0-0-0 per jar. 
0 0 |}65 0 0 — 0 0.0 per ton. 
0 0 118 0. — 0.0 0 perewt. 
0 0 $10 0 — 0 00 = do. 
160/000 — 00 0 do. 
12 0 09 0 — 010 0 do. 
Z % 
wo 
