The republic. [volume] (Washington [D.C.]) 1849-1853, 1849-11-07

In copying from the Boston Daily i'd
UertiSer the following article, which is OF
especial interest to our manufacturing and
sugar-making friends, we would call at
tention to the advertisement in another
column Of Mr. Gould, Of Boston, who is
the general agent of the patented improve
ment to which it relates.
Bakers Improvement I'm Steam Boiler
Furnaces.
We have been furnished with report of DR.,
Augustus A. Hayes, the economy of this
improvement in the construction of steam boiler
furnaces, which we believe will prove interesting
to our manufacturing friends, and therefore
copy the following statement taken from the re-
port
"Resuts observations on the production of steam
at the flour mill at East Boston''-Six boilers, of
Tufts manufacture plain cylindrical in form,
working three engines of IS 6S and - l4S horses
power, with forty three revoluuons-furnaces of
Bakers patent, with Tufts fronts, the ashpits being
closed, excepting small airdoors.
Frequent trials of the quantity of water con-
denscd in thirty minutes have been made by M
Longley, during the weeks subsequent to the time
of altering the furnaces. He found from feet
inch to feet inches of condensed water for thirty
| minutes, or an average of 2 feet B. inches or
increase of $500 inches for seventy four min
utes. AS nc increase of power has been noted, this
determination may be exposed TO theGrror arising
from more perfect condensation, or may be more
truly the amount which should represent the first
workings per comparison.
! The weight of fuel used, as given by Mr.. Long
ley, is reduced to 10000 lbs. per "a hours con
ssting of mixture of bituminous and anthracite,
in equal parts. If we take the bulk of condensed
water to be feet 81 inches, or feet inches deep
per hour in cistern, have $500 area by feet
| inches-ll65O cubic feet per hour, 1860 by "a
hours the running time-2,7 1876 feet Of water,
densed in "a hours, 1916 by 62.5 lbs, Gas cold
water) -l7475O lbs steam afforded; and this, di-
vided by 900 lbs. coal consumed, shows evap-
| Grafton OIL g lbs. of water by ID. of coal.
| AS before observed, do not know of any in
crease of power obtained, and in the absence of
definite evidence of this, am disposed to consider
the comparison more correct, FIVE take IA minutes
the time of evaporation for feet In depth of cis
tern water, or total of 600 lbs. evaporated,
during the consumption of 10 900 lbs of mixed coal
This is proportion of go lbs of steam obtained
| from | h. Of fuel; placing this form of furnace
| among the most economical known.
This form of furnace permits the combustion of
bituminous coal so perfectly that its -produc
ing power to be estimated as high that of
anthracite, while mixture of equal parts of anthra
cite and bituminous Goals gives high evaporative
effect.
As deemed the observations here made a
continuation of those made by Others have pre-
ferred taking the numbers given me by Mr.. Long
ley, from the everyday practice, 10 those obtained
by experiments on systematic plan, conducted so
TO insure the exact determination of the highest
evaporative power of the furnace. The water for
supplying moist air for combustion of smoke has
not been laid on, nor has proposed plan for econ
| omizing the heat of the flue been adopted; when
these additions have been made, the utmost limit of
economy in production will have been realized.
Respectfully, AUG. A. HAYES,
State Assayer.
Another report in detail, from another source,
furnishes an evaporation of 9.594-l000 pounds of
| water to the pound of coal from temperature of
1922, equal to 1908 from 2l2o F., being the result
of observations taken four consecutive days.
In order to form comparative estimate of the
value of this improvement in furnaces, it is only
necessary to state that the evaporation under the
| former arrangement did not exceed six pounds TO
the pound Of anthracite coal; and as the comparison
between furnaces of different forms, applied to the
same boilers, working under the same pressurey
being made on the fuel, is correctly estimated by
the comparative evaporation of water, il is obvi-
Gus that the gain s sixty per cent in evaporation.
An experimental trial was made TO determine the
practical working of the furnaces upon parcel of
6420 bushels of wheat which yielded o. barrels of
| flour ground by each ton of mixed Pictou and
thraclte coal, against average of 52S barrels per
ton of anthracite coal under the former arrange
ment. But the coal used in manufacturing the
| "a barrels was principally Pictou, costing the
same price per chdldron the anthracite per ton,
and the saving Is therefore about 80 per cent in the
cost of the motive power
in the western part Of country for each barrel
Of flour, is bushel. During the past week. ,S79
barrels of flour have been ground by ,O26 bushels
of Pictou coal, consumed in these furnaces and a
very large additional power furnished for the ele
walton of wheat and corn, during the whole period
OF manufacturing, showing sixty per cent saving
In this view OF the case. No experiments have yet
| been made In these furnaces with Cumberland
coal, at the flour MILL but at the East Boston Lin
seed Oil Works, where this kind Of fuel is con-
sumed, the furnaces yield g. pounds evaporation
TO the pound Of COAL being gain Of forty per cent.
on their former operations, as appears by the fol
| lowing letter, addressed to Col. Baker:
DEAR Sra: We have now had a trial Of more than
| three months with the application Of your patent
furnace under CD boilers, thirty six feet long
At first burnt white4ash coal the saving of fuel
and increased evaporation the former setting,
| amounted TO over forty per cent. Succeeding so
far 80 very satisfactorily, we purchased two car
goes Of btuminous coal, about three hundred tons,
and by the use of your application for tire desruc-
| ton Of smoke, still more satisfied with the
| results. The smoke is entirely burnt up, except
for about two TO four minutes at the time OF feed
ing, which OF course must be the case, the draft
forces the smoke through before perfect combustion
| can take place.
! We may add that our productive power is in
| creased pro rata. Our evaporation is equal TO 9.
pounds to the pound Of white-ash coal, (anthra-
| cite,) and of very poor quality. This was deter
mined by actual and careful experiment for one
week, day and night
4 We can readily commend ii 10 the adoption OF
| manufacturers, and shall be glad TO answer any
| questions relating TO il.
Wearc, dear sir, yours, truly,
JAMES LEE & Co.