, 1873-09-12
STEAM BOILERS.
The Tests to ITO Mn1o by tho Cons
Ercssionn1 Commission to Inquire
Into tho Cnuscs of Stcn1n-EEoilcf Ex-

Tho Tests to No Mndo by tho Con.
Ercssionn1 Commission to Inquire
Into tho Cnuscs of Stcnln-1foilcr Ex-
plouionx.
Special Dispateh to The Chicago Tribune.
WARRINGTON, Sept. 1l.--The Commission to inquire
into tho Of steam boiler exploalonH for tho
pensea Of whose experiments and teats Congress- np-
ropriatod 500 000 will conclude It's bora In tta city
tomorrow, Mud will begin their triAa at Sandy Hook
about tho middle Of October. Tcsts OF boilers viii also
haye nade aomo Of lts experiments at Sandy Hook.
Tho purpose OF tho members Is to mako comprchen-
sve though incompote report to the Secretary Of tho
include theirs in his report to Congress IN Decuuber
Work will then DO continued until thoir examinations
and tsas hnse ~ been made a9. which they VIII
ther laboro. Tho first aerea Of tcata to 10 mndo at
Sandy Hook viii consist Of riaa to tho capacity and
ton Of steam to test tho samo as to aupcrhoated
steam to tcat tie generating capacity and rapiity Of
H. metal IT sno vii" asE ssPefh
Of T combustion tast tho temperature undos glvea
meta tho ooct Of tho application of cold water to The
internal surface Of the ateam chamber Of Rteam boil
or while noivo 0ros and generation Of the ateam aro
steamboat boilers, Us constructed and used. tho cfec
Of gradual increase OF tho pressure Of stean udor
e ss " T. = ss ea
upon tho subject occupying tho attention Of
tho Commission, to forward such information TO the
Board aud also opinions aud theories entertained by
sciontiats nna engineers on tho various cauaes Of
tribute, for experimenting PURPOSES 8pecmonB Of
eafety-valges ono Of the puToacs Of tho Commission
boing to determine tho bost form, construction aud
dimensions Of safesyyalves that thoy may 10 wlat
thelr name denotes, mud operate automattcal-
ly to relieve tho boiler that 1t wilt 10 I'M
moleatcd, to explode or, burss q boiler. In or
binary use by the gradual accumulation Of atcanl.
III regard to the tests to bo malo 1t Pittsburgh, the
Oommlsaion has decided that three OF tho booTs ono
Of steel and two Of ron bo tested for results on tho
ultimate strength OF the sano, Gy being fired up and
the pressure increased until rupture occurs That two
boers one Of steel aud OF iron, bo subjected to
continuous serfea OF esa, such by Water gctnont
etc., both boilers being tried, as noag o. can bo
OF Tho Commission, this usage has been carried far
enough then thu latter two boilers to bo rptnrc
by steam pressure, to determine tho deterioration to
tho boilers, and aao as comparative test between
iron and stsel 10 Withstand such usage. Tho same
boilers are to DO uscd for tho pufposo Of nklng tho
tcats roatlvo to tho proper area ot safety yalvcs
report read showing tho rrogrcss ina!lo by tho
July laat, when tho ground upon which tic o1porl-
ments hre to 10 mado wcro selected md tho contracts
for boilers, etc., cntcrod into. Tho building
for tho ahop and for tho accommodation Of tho work
mon Oh the ground, hna been completed. Tho 1oilors
contracted for at Pittsburgh being madctho ono
con.r'lGod Of iron plates nearly completed and tho
steel boiler ia under way. Tho Iron boilor con.
progress. A now boiler III now beiug coneructel at
Cincinnati, aud will bo ready for shipment to lta
dsstlnatol. Tho gauges, ordered ut Cincinnati, will
10 rcadg for delivery Boon they can be cxenod