The New York herald. [volume] (New York [N.Y.]) 1840-1920, 1864-04-27

c. L Carty sworn-Am - engineer n the Unitsd s,.xs
Nsgy; kept watch the Pswtuxss hsr iai trip Or
sissy SIX hours; did notice anything wroag ssess
that she lftsd hsr water slightly; MOI -.
noient 70 inoosvsaienos tho working q tho shUs
- wsssr gauge MOI Hue indtss-
TOR Of ths water IN the boiler the boiler foams, Gaags
mey isaosss swo and half cocks. and the boiler mav
have more or LEES; believe shs Brooklyn boilers wss
ths sas - The chsaange's have bad about sixteen
ssssnssen month"; experience with the Martin boer -
DO MOI know that they require moro csre thaar
oshsr marine boilers. roamins b hardly sic
for srns Other purposes; the prominent caus
foAmng The different waters. salt and fresh sss
requiring more temperature to boil than another n -
.a.Ass more doul . kssO sssA supply Of water sA:s
never had sufficient trouble 70 make me Sssl
otherwise think the boIsr q the Chenangs
equal to the task attended for h think would oonsds
nyssk with boiler that bad stood pressure Z
thirty.avs pounds; should think II the lead ous'as
M boiler had melted that thers had been are h
sample, think tbas i bad been soiisred the co q
ietins shown seem: 700 much sco!ched 20 have besr
cold water pressure and not be noticed tbs time
Tnos. Faron sworn-A master m,chinst 10 sns
oo, @ ss Martin s'i S
at sne wharf and some few times on trial trips; q -
ss ns ss %
iers and concluded from observations that the boiler
Dsniei Martin swovn-Resids IN Washington n T.; !,
Am an eoeinesr vas chief eosiueer and also enstrc
inchiss o. the United States NAVY am sns ps.soss q -
build Thorn IN 1854 the tubes then arranged absve
furnace the same e they are now sovae stsralt
tubular boilers Is these tubes p oed vertcaY
tho tsbes and che heated sasss ON the ouiside,
tho gases nrst pass through the furnace eol
return between and around the tubes the advantages
i pefteCS ClfCut0010D
Of water both for tho upward ard downward CURRENT
these gases come in direct contact with -
tubes, and passing through between them. 9
Same .s.o: sa - &C.
Of economy Of fuel the boiler I also consider sassf
%: m. s . 4 vat. s:. .s s e. 10: " s ss -
tubes may b but half submerged In water from Tie
steam generated from the crown sheet below: -
. portion OF the tubes submerged In the water
win carry up constant supply OF water flowing over
the tor q the tube upon. tho tube sheets; sDo.hss
Of heat half belsg In the water will be absorbed b.
the water below, while the other horizontal form
gets below that tube has nos the water flow
ing over u. and not coming IN contact vim
tibty Of the metal; my boiler made strong
other marine bolers u 10 possible to get proper assn
iron acts as truss on the Shell ny securing ths
braces IL the fastening the top Of tho uoo
@ The brace coming TO nm angle as must iron, NJ
topo the boilers 20 the sde OF the tube box. Ia V noe
tb0r6byy "A.
heavier consequence have NOT examined tho boilers
the inside think the cause Of the explosion was that u
greater than the braces could bear DO -
think the explosion caused by the foaming ~
the hoier have known foaming 70 increase the
pressure OF The boiler imagine the pressure .
which that gave but suppose that would stand -
the pressure Il was tested at: should boiler been
oversuaiued at that test It might give away afses.
wards at . less pressure; the only cause q
the explosion that can ascribe IS that thsrs
WIS greater pressure than the lug could oeasi
tho constant surgng Of the steam BY the stroke e
have tendency TO weaken 10 tne and that 10 proposs
time :. Of tn the rss test think hugs Of the ss
shown sufficient Ia stay the top Of ono or my O0ioSU
i feet x 1 oSs cs NJ
SELF would make heavier: the iron now shown con.
slider very sse brace iron Sc very sa
had been punched hot do not think this was an expse
son d. not believe the rupture was caused By suddea
pressure the vessel, believe. had not been quite a.
hour from her mornings consequently she had not A.a
time evaporao the low enough for tho steam -
come In contact with the heated METALS whereby W.
steam could become sophisticated or ssroharged, -
water having DO reduced low for the reasons e.
psinsd in regard the safety Of the boiler; and =
have heard no evidence 10 show that tho oosss
Captain Fneorown informed mo that the engine I'D
boiler working beyond his expectations: graAea
gauges Il Is not likely that from the gradual rsing
sure indicated BY the gauges an engineer IN chasgs
instruction their ss,snsoo might howsver. have bssa
called 70 something ese burst would rise the dso>D -
thar would EXPECT IRON burst; have never hesra
Of any complaint about foaming AFTER the bcsse
s ass dr n9sa pp s''' Originally We took hs steam
the top Or the steam chimney; The steam onsnr
usy esoss.y Kept yssy sw 90 pu,n me1 srv 49,. -
water would swash up Into the stsampps the dry ppe
accomplshes the objects for which y WAS inte.esa;
remedy any defect from lifting watss; think IN ~
Monitor boilers have dry pines .,... 49,.
bracing OF the bosrs ample the report q w. bessP
maker, who sxamnd them after Ne hydroetasc pre-
sure TO which they were subjecsd, proved shen 70 %
Louis scharding recaled-Mads perfect sxaninsss.
accepted BY the and found THAI nothU
had given way; everything right.
tinen.a Iron WORKS. Greenpcint; examined the bosIss
since the explosonhs point Of rupture; the brace
square ncn Of section with safety: think tho bonsrs
may have been unduy strained by being tested ~ ny
see any thing else on ex,minao hs. would lead me =
this concluson did not notice any thing that would sd
the boser the boiler had exploded with pressure q
from hundred 10 two hundred pounds the boat woue
hardly have come back 10 New York.
John Waller recalcd-was foreman Of the Morgan Iron
Works up TO tho 18th Of june the plan OF bracing The
boiler was all laid out and supposed the braces were ~
hcicnty strong to stay the boiler for the work was ~
Mr. Z. & Do Luce recared--rhsrs wey. tStrty I've
Tugs The boiler think 900 poupis very high sss
mate for piece Of iron x resist In boiler, the part
ihsrsiore woud consider Is, ooo pounds Sish STRAIT:
On lug Tor boer the roof q the bQier Of the Cha
mango CONTAINS 100 SQUARE let multiplied ~ sssy
ths number q square inches "a lOol Elves 2a.oSe;
70 have been In the boiler, gives 800 ncheS 70 tIA
that multiplied By 90 u pressure at which the boiler
tested, would give strain OF Fl 900 pounds upon
the stay, Dot reducing the luRs "a half the humber
puts strain upon the lug Of 3 200 bs which was Coz
sdered a ultimate strength 20 require only Is 600 III
DO not think tho boiler was properly stayed
W. ~ Hill recaled-Testined that he did NOT know
how many lugs there were inhs boer supposed there
were sixty-four.
John Wilder sworn.-Testined 70 the theory o. ~
explosion Of boilers -t nj
Henry W. Smith testified to'boing engineer, and -
charge OF the Metacomet for three days for the bud
and present al the trial Of ninety six hours whcs Al
worked very we'll with the valves In the position wo
pced them but being ordered alter hem By the nreA