New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1871-08-05

boiler were exploded under an excessive pressure OF
escaping ~ hc s Ttnr ~ ,e IIopfp a o. nv ro ouo
youtake fruit can, for instance containing little
heat is sucient 10 d % P he aaT asv from the
menteH srace 1t might explode with defamation, but IL
he square inch II the water in the can was allowed to
, siuty 80 that the particles OF steam would have
10 rise to the surface when the pressure
81 nc steam became 50 great that the would not
| pl0sion, but simply rending"
"ARUsTY vALvRp
Henry Lubbock said he had had Il large experience as
an engineer In NewYork and in the Western and south
States he had made three visits 10 the Wes,acld
since the explosion and spent two three hours each
time in examining the ruins the water line in the boiler
was very dsnct he found the furnaces as perfect "a
furnaces generally that have had the slack OF the
braces taken up by pressre ne thought that there must
have beena pressure of at least 90 pounds OF steam ON
( the boiler when II exploded
q DO you suppose such pressure was in any way in
dcated to the engineer by the safety valve by the
pressure OF steam on the gaugei A No, Sir; believe
that the engineer thinks that all he said true, but
| know he mistaken.
q. How do you account for the fact that the steam
gauge indicated but y pounds just before the explosion
A. IL has been the custom of that engineer as he says TO
carry from 10 n pounds OF steam and the spring in the
gauge has been accustomed TO whrl round just TO that
point il had become fabricated mp to that point but be-
yond had become rusty and obsucted by foreign mat
O. How do you account for the fact that the safety
valve did not open when as the evidence shows u was
loaded to about % POUNDS, ana hbefaf the excessive
pressure Of steami A. believe 1t was opeh Dut not
enough.
w. Williams, who was sent by a Committee of the
Keystone Council of Stationary Engineers Of Phila-
depha, said he had examined the boiler, and believed
that the explosion caused by difference OF expan
of the parts Of the boiler owing 10 the increased
density OF the water consequent npon It's increased
specific gravity caused by ncgecting to blow out the
boiler aud keep 1t clean He believed that IL was very
dirty The appearance indicated that it had ample water
the time the explosion occurred, ana ne thOuRhb the
boiler was strong enough 70 nave pOIhe Io ~ ~ %
pounds the square inch, If IL were not Tor the dier
ence Of expansion in the different parts OF the boiler
caused by the increased density Of the water He did not
believe that the boiler had been blown out for weeks
and he satisfied from the construction OF the boiler
that il almost impossible 10 blow il ont properly
The blow ought be In the back end under the smoke
S Sq e 3 PG Of g ag mont as P Se 3a4
there in the boiler and therefore no place TO put the
be got out. He continued Water, at ITS ordinary
density, would require to boil 22 degrees OF heat but II
II increased IN density from organic inorganic sub
stances such found in all waters the point OF boil
ing would be raised and as steam was generated ana
have to decrease in temperature on account OF
this pressure, admitting that the water was pure.
neghborhoOd of degrees OF heat TO raise steam to
of "a pounds to the SPARE inch and that steam
steam, but the water would not have temperature due
creased beyond ordinary water and while the bostre-
manned comparatively quiet this heat would Dc absorbed
npon IL the lower part OF the boiler receives creator
temperature than the surface Of the water for the reason
temperature due pressure of the steam and the
pressure OF the column OF water upon IT,"
O. Is IL ordinarily the that the lower part or the
boiler as warm or warmer than the top OF the boiler or
surface Of the water A. Yes the neat y stored
mp from the bottom along with the less dense w3% and
the change between the density OF the two sets free heat
in proportion to the change made between them
@ Why is IL that the water at the bottom OF the boiler
nci A. The dust on the plate OF the furnace is very
poor conductor of heat but remove that and the lower
top Of the steam chamber and from this believe
the boiler exploded the upper and lower parts OF the
lures leaving the sides comparatively slack hente they
The boiler believe would have been amply strong
II not for the difference OF expansion in its parts
caused by the increased density OF the wter properly
cared for would not have hesitaedsto the boiler
with pressure OF 40 pounds TO the square lneh saw
indications OF a crack but what called bnsters"
a. the shess most all fange iron is subject to bisers
or less; the sheets found To BE most homogeneous
are put into the inside Of the furnace; it
Is generally considered however, that these
bstered sheets will stand nearly as much when
put on the outside Of the shell as homogeneous
sheets; IL is sometimes the that iron sheets
having bser in them are put into furnaces without the
manufacturers knowing that they are blistered in all
great care is taken In sounding the from found
the bottom part being the thnesti he arches and hes
seem have been in good condition. IL possible that
there might ihaye been or pounds more Of steam
in the boiler than the gauge indicated under the existing
circumstances do not think II required more than n
been comparatively pure believe it would been impos-
sible to have parted that boiler with pres
the boiler Was dlled with impure water, think
that p pounds would produce an explosion; do not
a
although have known cases where an engine had been
worked for long time at So and the weights in
creased TO- the gauge indicated only 55 have never
seen a spring gauge that has been worked up 10 a con-
slant pressure would work above 1T; where 10
has been worked long time 10 PRESSURE II becomes
comparatively fixed in its action, and will not move with
regularity have tested great many gauges, bnt never
found that would work above below the mark that
II used at.
O. How long would IL take gauge 10 become>de- |
Perforated so that il would not indicate correctyi A.
have known gauges of the best makers 10 become 80 III
a few weeks
O. What evidence did you find Of there having been |
mud bottom Of the boiler at the time or the eXplo
sion Would every particle OF evidence OF that kind
have been obterated by the explosion and the iron
have been left in comparatively clean state A.
think not; think found mud there to-day at rate
found sufficient evidences 10 satisfy he that the water
must have been very dirty.
O Does your principle OF q difference of expansion
enter into test by hydrostatc pressre A No, not at
ALL only under conditions OF increased density Of water
the heat causing IT,
ANOTHER DEATH.
Martin Reider, age 81, cooper VINO was very badly
scalded about the head and legs died early
day Bellvue Hospital. The body removed to his
late residence, No. 800 MadsOn-st.
Josiah Abbott, victim OF the Westfeld explosion,
buried yesterday from his late residence, No. q
Consey yeast, Brooklyn