New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1864-04-23

iron shown IN drawing has probably run down very
near the tube sheet about - ieet thAk tne ~ gun "
rail IN question would be apt 10 spring with the pressure
NJ a. pounds without the braces the rU' beng lAstc
and the brace no1-castc the strain you'd not entirely
come upon the brace, re two combined forming
stronger brace thar ehor wOud singly; find IN INC
drawing egt spaces for stays To be placed IN font o
tbe 20 and the same number lcngthWlset "non
" Ouid the strain 10 come upon 81 inSs ihsn i
CA after test of 60 pounds IL is not possible to ehpD"
boiler with less, unless some change mas u'o
il is possible for change 10 take place, as III putting
Hydraulic pressure the boiler az It only REMAINS on d
moment il may stralp something which may give way
nj some other fine In boiler properly stayed, every
iron is supposed 10 he fast 10 iron the elasticity OF TIE
bar the safety OF the boiler 6s the ron II caphe OF
certain degree bf elasticity without fracture the elias.
cify Of me bar will allow the braces to come TO equal
mn without pressurc in my opinion they had been 1t
work In the boiler and detached some OF The braces
and ncgecunS To ADJUST them' tn2 t%P'Y'on Iese.yu
I'm consequence; have not e1lpned The mlciior OF the
boiler; it, on examination fhnud that opinion erro
neous could only say that think there was too great
a pressure on the boiler there is nothing on tue brace
shown that would indicate that excessive heat had been
apped; II tho brace had been heated, II would show 1t
in some cases from the water being low IN the bOler
this brace does not show that appearance; have given
The pnn Of the Martin boiler considerable Indyi have
superintcgdcd the construction Of tWs boilers Of the
same style; never heard any opinions expressed as
against the safety NJ the Martin boiler regard them
as safe Other if made Of good material andpf0p-
ery braccd for ordinary pressure Of steam saw the
rupture the shell of the boiler; think the explosion
was caused by aneNccssye pressure when parted the
"A portion Of the boiler Is good lrOn the IRON OF the
braces also good don't think the explosion ives caused
by defective sheet Of iron the piece shown was part
Of the boiler.
| Edwin Farron sworr-Rrside at No. l97 Schermer-
horn street. Brooklyn; am an engineer by profession
but not present Superintendent OF the Morgan Iron
Works had nothing 10 do with the construction OF the
boilers OF the Chcuango: examined the rupturcd
since the accident; noticed the fracture in the shell
the iron shown j. good-betier tlan geneT! used dld
not any iron about the shell which thought defect
i've; IL appeared be fracture from the ryets; did
not the mercury, but examined the telitale; the
mercury wOuld blow out az ~ pounds pTessure II the
mercury blew out az 30 pounds il caused noise that
any experienced person would notice, II IS dhcn 20
whether the Xposi0n occurred at less pressure than
~ pounds no person could tell under certain conditions
of The boiler what length OF time II might take to gen
crate pressure sufficient 10 explode boiler before that
pressure could reach the mercury gauge 1t would take
considerable time to raise the pressure from
81 10 % pounds, that II would be indicated
on the gauge do not think the boiler
pl0dcd undcr n less pressure than 60 or even
seventy pounds; TIE Inspector should have discovered
any defect In the construction Of the boiler; my i'm.
preston Is that must have been something cNtrauTdn
AIRY 10 have caused tho explosion; II the braces acre
put in a. the Inspector stated Two braces Leading TO
strength Of the single lug anticipated 20 Withstand
much greater pressure than that supposed 10 be upon
thc boiler under ordinary CIRCUMSTANCES; think that
the section OF iron len IN the lug being one inch by
its breaking weight could not have been le~ than
l9cog 70. being equal 10 60 n PIT square ihchi OF
| Monday week ! asked Mr. tahill how everything
Was ON board the ship he said everything all right:
think the Martin boiler safe boiler, do not think 10 rs
sHff cylinder boiler; the engineers having the Mar
tin boilers in charge have found iault with them IN re-
gard TO foaming; the general opinion Of the Martin
gyel is that igams more VI less r Calm vas con
| sdcTed q careful man.
| Tlos 3 smith VI D. surgeon IN charge Of the
United States Naval Hospital, testified that up 10 the
present time 20 bad died ia consequence oi scalLs
| b. the explosion " t!e boiler on The Cheuango.
| Henry Hoffman. master boiler maker testified n
maxim. partial examination OF the damaged boiler. vas
prpGtl O. hen piece taken fiOm IL was tested y vas
\ fF sample of The iron used Tor that purpose; did not
notice an, iron on the surface Of the boiler that de-
fecyet had taken leading part ih constructing many
marine A. vel stationary boilers. and had examined
this sufficiently % form opinion % the workman
shin and mechanical constructions n was fair sample
Of the Martin boiler in by the Government; think
wa sufficiently Ursccd for TIE purpose for which II was
intended approved Of the mode Of bracing appued 70
the CheugngO. boilers; think the best mode Oi bracng
boiler Of this form il combine the 1 iron with the
rigid brace ~ depend upon tue two jointly 10 sustain III
have been employed boilers 81 similar form, and
did consider the bTacing suihcicnt would put the
braces ON Dat surface every 10 inches squareno, -.
than u or u inches apart II the surface was strength
oEed with the iron the shell 81 the Chenang"s boil
ers . sxteenths Of an inch Thick the explosion IN
my opinion caused by n deficiency OF water which
deficiency caused by fu,lning.
| frank j. Bell-le.des ~ No 81 Sixth avenue. y.
Y: took the Indicator diagrams of The ChonAngo boil
ors while running the W hours; tie pressure On the
cylinder 10 pounds and OF the boiler m pounds the
the piston strike the water; very fUw naval engineers
serc present during the TRIAL did not see the boilers
tested
| John Dolan sworn-RcsiIes in North Second street
near Second street frookyu l. boiler maker; exam
| med tho iuptUfed boiler as well the opportunities
afforded perinit-l dd not anything that indicated
bad iron Judging from the testimony, the explosion
caused Dy a scarcity OF water IN the boiler wOud
account for The scarcity 81 water from the fact that the
engineer compelled TO blow the engine down; the
boilers foaming more or less the furnace DOOR were
opened Suddenly, aud cold air passing through. the
water found II. level tie top ~ r tube bon thu brcCm
ing bare Of water. think the Martin boiler safe bat it
requires greater attention In consequence OF difference
In construction, thAn other boilers the heating surface
IL extensive than any boiler made resulting IN
making " untrusfworthy.
John +. Powers sworu-Gesido corner Of Myrtle
sud Ciermont avenues Brooklyn an IN engineer and
machnist and inspector Of sintionnr! ,totm boilers
examined the outside oi tie boiler on TIE Chen,ngo
and found about i've inches of mercury bpHG ont 0 the
gauge assuming that the gauge was flied the time
II put up blowing out %! mercury proves That
there an oyCrprCssuTo OF steam; there vas 10
water IN the pipe leading from the boiler which proved
that there must have been heat IN tho upper part,
quantity Of wator wal blown through tho mercury Ia
the gauge; the toll tao about - nlhos above Zero
the gauge the te!Ltao sbOu.d have boon 81 q; the
absence Of mercury was. IN my Judgment IN nillible
proof that there too much power in tho boiler; no
ticcd defective iron; IN Consequence of tho great
amount Of heating surface in tine Martin boiler the
generation Of steam In so sudden that the hoor must
get sudden relief 90 be saved boiler With large
heating surface Is more liable Ia make water foam
than others would pot consider boiler subject 20 sUch
change a safe one 60 adopt for the marine service; tho
mercury gauge about throa.cghihs bore; il ia
good working condition with the exception Of tho ab.
| ssnce OF mercury.
| Elbridgo LAYTON sworn-Iesids at No 80 oxford
street BrOoklyn em CmefLnguerri ~ The T. :. Navy;
had great deal OF experience with che Martin bOl,r
both in their cOnsi ruciOn and shpbonrdi bad
charge Of these kind Of boilers three ships the mig
ate Colorado. Roanoke and Mississippi; ON the hrst
months, the second 81 months. and on the third
20 months Deyer noticed anything daring this tic to
weaken my confidence IA them; have noticed the Mar
tin boiler TO foam but they are not likely 10 foam
| A. I.f ar gf