The republic. [volume] (Washington [D.C.]) 1849-1853, 1849-06-28

reference to the fifth line in this statement will
show that the quantity Of water evaporated per
hour was somewhat greater ioith than ,oithotl the
furnaces; but it should be remarked that, had it
been necessary to work with the hampers wide
open before this invention was applied, this could
not have been the case, there is doubt that a
greater draft will be necessary where the new fur
applied and in this case it became neces-
sary to open the hampers wider
The seventh line shows that, when taking the
Goals from the heap, ,citho,a the furnaces, ID. of
Goals evaporated TIPS lbs. of water from 2l2O and
,cih the furnaces, g. $40 lbs of water or IL 8 per
cent than ioithout. And the seventeenth line
shows, when taking the Goals, minus the ciinkers
and ashes, that, icithoa the furnace, h. of coal
evaporated s.2l7 lbs of water from 2l2o and ,oiih
the furnaces 9.273 lbs of water or 1913 per cent.
more than ipithou.
certaining what sized opening for admission of air
would produce the best effect, found when any of
the air-holes in the bridges increased rather
more than one-third beyond those recorded, OF
square inches,) that the reduction in effect ST
per cent and when reduced rather less than one
third, the reduction in effect was q per cent.
CARDS economy IN fuel II would appear, therefore,
that the areas recorded are about the best.
filter this trial, which exhibits a saving of lib
per cent. of fuel in the Cornish boilers, | can have
hesitation in declaring, that the saving Of 81 per
cent upon the average, stated to have been effected
IN the American establishments has been effected
and that there numberless in Great Britain
where similar saving might be produced.
have thus far reported upon the advantages of
the invention an economizer of fuel, and not
smoke-consumer preventer for although the
smoke Is undoubtedly diminished, not only on ac-
of the reduction in the quantity of Goals used
but owing to the air admitted through the bridge
yet there Was not fair opportunity of testing its
merits as a smoke-consumer or prevention, on ac-
count of the arrangement Of the fues of these boil
ers. believe, however, that with the straight
fue to the chimney, as in the American furnaces, a
much greater reduction would be effected. 1t may,
perhaps, be as well to remark. here that the gen.
crafty Of boilers and furnaces are so badly con-
structed that the waste of fuel and consequent
increase Of smoke is enormous. In any case there
fore, where the only objection to using any appa-
ratus for the purpose Of consuming preventing
smoke is the extra cost Of fuel, this would be more
than compensated for by an improvement in the
furnaces and boilers; and if reduction Of fuel
effected by introducing slow combustion generally
have doubt there would be an average saving
Of 80 per Of fuel in the manufacturing estab-
lishments of this kingdom. This would cause an
actual reduction Of smoke in proportion to the fuel
but there is also doubt that the reduction Of black
smoke evolved from the chmneys would be in a
much greater proportion than the reduction in the
quantity of Goals, in consequence Of the slow COM
buslon.
THoS. wlCKSTEED,
Engineer.
EAST LONDON WArER-woRKs,
Old Ford, June 81, l64S.