New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1864-04-27
-,y n,.asTEs %. gmE CHENAHGo.
r..,;uua.fon of sbc COro"eT's Tn'"Saig"-
tioa.

,erdav before Coroner NoIIs and jury lle ing
witnesses we're examined
n r, Carly sworn-Am engineer IN the =. ,; Navy
It rarh on the PawtuckC on her tiia zap ol "''c'y
hours did net notice ay 'ia ' W., snjcept 10 neon
jencc The working q. ia Saip. lie Wsc, s@nse
rot true indicator Of the "1jef IN tlv d ,he
boiler oamedi gauge nay ihotog - ~ 1rooIyn's
boilors nav have more or las, Dt,i'Fe the
SOiiers were the same the Chenengosi nave man
bont 10 or II months experience "ith lhe -hs at
bIer and do not know that tie, require more cue t' ~.
py rins hoiler A f,lming boiler Is hardly sac lot
r,arnp w other purposes The mCSt pFOuiiHVht
~ banning are caused b. the different %atr1 Aat anu
fosb oDe requiring temperature 10 oOu tnan tuc
n,GaT n IS rather more difficult 10 Accp mesa sappg
of water in q boiler that ioans than any olntI
baye always felt safe; never Aad suhcleht uoupIe
~ make me feel othcrwi'ei think the Doheis
80 Che Cbenango had been injured by cold wa
ter.pressure making il unequal to tho task IN
tended Tor IL; would consider myself sac WIN
boiler tt1t had stood pressure or on pounus coI
.or 81 the steam pressure c 50 pounds should think
81 the Iced outside the boiler had been nceu naI mere
had been fire in contact with / wonid, taking Inc
niece shown a sample thna that II had been soldeTeai
The piece Of fcng shown seems 700 mnch seoreHeu 70
lave been done by solder think The boiler could be IN
jurel by coldTaeH pressure AID not be notlced az
T1oS H. Taron a niaohintst in the Brooklyn Navy
Yard testified shat his experience extended oay 10 the
use OF the Martin boiler al tie Whif ara solne lew
fines on trial trips; from observations, he never had
nv doubts rs 10 their safety; thought thS boiler was
more inclined 20 foam than others. ~
Daniel i. Martin, swOrH-Ees!de IN W aSMngton n
j.; am an engineer: was Cflcf Engineer ana also EItl
neer in Chief Of the T. s Navy; the pateutee of the
boiler known as the Martin bUcr first commenced 20
bud them in 1851 the tubes were then arranged sOo'e
fbp furnace the same now; some alterations nave
been made to accommodate them TO CrCuTstait ssi
Inc difference between these tubular and other tubular
boilers is that these tubes are placed yeicay aVoN
te furnace the water passing through the tnOcS anu
fine heated gases the outside; the gases hsl puSs
tr0ugl the furnace and return between ana MCuu TIE
tubes: the advantages claim are. first the more PER-
~. rt,tion NJ vrctp b.IN
downward currents-the more perfect combination
and mixing up Of the gAscs these gases come III uTeet
contact with the tubes. and passing tronsh nelMeSh
them a greater amount Of power can be got ont OF te
same space occupied. with greater economy oiluel e
boiler also consider safer from the haDlhty OF Wa'er
getting low in it than the other forms OF melne poher
r S reason that the tubes nav be but half submerged
In water from the steam generated from the Drown
sheet below and portion OF the tubes submerged IN o
water viii carry up constant SUPPLY OF water moving
over the op of the tube upon the tube sheeiS another
reason Is that the metal OF the tubes are good eonO9c
ars Of heat Onehsf being in the water VIII be ahsoroeu
nv the water below while the other or hor2oni 41n
al fines or the tubes as soon the wate- gets OeoW
the tubchas water flowing over IT, and not coming
in contact with the water the heat cannot be carried on
by The cJnductibity OF the metal; my boilers can De
made n strong as other marine boilers; il Is possible 10
get proper fastening to the top of the boiler Iof the
reason that the iron acts truss on the she aiso
by securing the traces 10 it get the IasehiDes uP"
the top of the tube-boKes by riveng the SIDE shees
O. The brace coming to at angle, as ~ must from
the top of the boilers the side of the box is II
not weakened thereby A TIE iron would require 70
be heavier in consequence; have not examined the
boilers the inside, think the cause OF the explosion
gas the the pressure was greater than the braces c0d
bear DO not think that the explosion was caused by the
fosning Of the boiler have never known foauinS to
increase the pressure Of the boiler, nor can imagine
cha pressure ct which that gave way but suppose that
& dud sfnrd 70 the pressure it was tested OF should
ale boiler have been Oye-strnined at tmt test IL Sb
eys 9ay aiterward at less preSsure me Only cause OF
greater pressure than the Ing could bear
fbS constant surgng Of the steam by the
stroke the engine or the constant wordng OF any
thing viii have tendency TO weaken IN TINE, aud that
in nTopoon TO the amount Of the injury II any existed
At The time Of the first test; think 81 ags OF the SIZE
shown are sufficient to stay the TOP OF one o. ny pone
rsasnruo fs feet by 10 inches AZ zyponDds pressure
ner souars inch bat If were building one FOR myself
would make n Beayisr the Ion now shown consider
very good the iron being pGnehed COLI makes ~ pecn
weaker than il il had been punched hot DO ot tnhA
this was an explosions do not believe the rupture was
caused BY a sudden generation Of pressure but 10y
Gradual Increase Of pressure; the vessel. btAe'e
lad MOI been quite an hour from her Iaoorlnss. /
consequently ale had not had time to-
eyspoTste the water low enough FOR the Steam 10
come in contact with the heated metals whereby Inc
steam could become supoThcatcd or surcharged; the
water having 70 be reduced low for the reasons x
planned in regard 10 the safety OF the boiler ana "
kaye had evidence TO show tLaf the bOIef Oasd of
prIned n going down but 10 the contrary; Capt FINE
brown Informed me that the engine aud boieSs were
working beyond his expectation; gradual ihcresSe "l
pressure would be gradually indicated by the gauges
il is not likely that, from the gIadgRi rising pres
sure indicated by tie gauge. the engineers >. c-as
would allow that pressure 10 rne D!ohu thc P'iht
of instruction; their attention might however nave
been called 10 something else; burst would use me
decks, osfOund on the ChT"ngo; the damage done Is
not greater than wcN expect from burst; nave
boilers had been cleaned out BY Ese IN regard 10 tEs
dry pips originally took the steam IRON the Top 1l
the stean.ohimney; the stesm.chimney Is generally
Kept very low on man.of war; oftentmes in heavy
sea the vessel rolling badly. the water would s"esh
M into the steampipe the dry pipe aeeompshes lhe
object Cor which was inteAdcd should tlihk the ~!
Dinp mi the bOCF 10 remedy any OcicCt
from lifting water; think the Monitor boilers have
dry pipes
The boilers simple.
Louis Soharding recalled testified TO having ex-
smined the boilers o. the Chenengo after acceptance by
the Government, and found that everything was right
Thos. 7. Rowland sWOrn-Am proprietor OF The Con-
hnenis Iron Works st GTeeDPOint examined mo bol!'
since the explosion particularly the point oil ruptre
the brace exhibited would stand pressure OF xovS
pounds TO the square inch Of section with safety think
the boilers NAV have been undnly strained by being
tested b. hydraulic pressure, which might nave been
e cause Of the explosion did not see any thing else ON
Examination that would lead 10 this conclusions did
not notice ANYTHING that would indicate q weakened
point along the Of fracture OF the boier II the
boiler had exploded with pressure OF rom ~ 10 "
F cIs the boat would hardly nave come O''' 70 '"
John Wallace recalled testified that the plan o. brae
ing The boilers was all leid out up to the time lie leI1
The Morgan Iron Works on the 18th OF Junei sup
posed that the braces were al made according 10 Dis
plan thought they were sufficiently strong to stay the
boiler FOR the work il was intended to 10; M
u. s. De Luce recalled testified that there were ~
ugs In the boiler; thought 90 900 pounds very hign
estimate for piece Of iron to resist boilers the part
broken amounted 20 about three-fourths Of square
inch, therefore he would consider 1000 pOunOS gh
strain for boiler; the roof Of the boiler OF the One
mango contained 100 square feet multiplied by IA
the number OF square inches IN q f0ot, gave 23VfV
which divided BY "a, the number Of stays supposed
70 have been in the boilers gives $50 inches to stay
nay multiplied BY 90 ponds pressure! at winch me
boiler Vas tested would get strain Of 81 COO pounds