The weekly Panola star. [volume] (Panola, Miss.) 1857-1881, 1866-03-24

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tlfa,' and BumefHs other slaee
n ines II was am fund. hawees,,
ihat tubular ioilers wen M moro
dangerous Than others. II prmsrlv
arei faF, and that, II explosions a..
efiffed, I was na from any inherent
defect IN The system, bnt Ly rcsrn
NJ gross neglect On the part N these
IN charge. II u not The boiler which
is dangerous, but The men In charge
oi II.
As tubular boilers generate steam
more rapidly than nuo boilers, they
use more water The fire surfs~..
being finely divided, 20 10 speak. or
spread In small arcas through a Iarrn
body Of water, are liable 10 get over.
heated very npidly II from any
cause the supply Of water Is stopped.
And, since they always work al
higher pressure, constant and intel.
ligent care Il needed 10 prevent them
from being injured.
The boilers on the Mississis>ippi
river are not exactly what would 6e
called tubular boilers In this part Of
the country, since, if we are properly
informed, the majority have tubes
five inches in diameter. Itisnot the
size Of the pipe that determines the
character Of the boiler, Cor a tube l.
tube whether Eve inches or Eve feet
in diameter, 80 to all intents and
purposes these boilers arc tubular
boilers, having large fire surface and
small watcr spaces.
Where heat Is rapidly conducted
through water, as in iron tubes, the
water Is rcpcllcd from the hot sur
faces, and dirty water, such as that
In Western rivers, more RAPIDLY than
clean. Moreover, from the method
Of setting the boilers they ars nm
equally heated, 50 that one side may
be intensely hot, while the other &
comparatively cool. The boilers In
the center Of gang Of fve, being
set in row, must necessarily reccivc
great portion Of the heat, while
those outside have not so much; the
result would be TO make steam faster
In the middle than in the other boil
ers, and not only cause them to fam,
but TO drive the water ont from one
into the other. This Is not uncon,-
mon, and many engineers have
noticed In a gang Of boilers that
rapid firing, as with wood, will give
three cages Of water In . boiler that
was scant, and less in the other that
was full. y.
Dirty water, as we have before
remarked, Is very bad for any boiler,
but particularly for these. Our en-
ginecr correspondent says: "I have
seen the spaces between the nues en-
tirely stopped up, so that they he'd
10 be drawn to clean them. Where
mud accumulaies to this extent, Il il
certainly not difficult to account for
the explosions, or rather coIIapses,
since most Of the accidents are Of this
nature" -.
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