New-York daily tribune., 1866-04-04

would take time to consider it. Decision received.
Roller Explosions - Interesting Expert.
ments by mr.. Norman Wizard.
Yesterday large number ofwell-known gen.
tlemen assembled at the shop Of Mr. j. L. Pass East
Twenty ninthst In this city upon the invitation OF
Mr. Norman Wizard to the practical working OF ais
inventions for the prevention OF steamboiler expo
sions Among those present we noticed Messrs Peter
Cooper G.. NJ. Beach, President Farmers and Citizens
Bank; Charles II. Hasnsll. engineer; the Hon. Wm.
Mathews of the Bureau OF Customs and Us super
vising Inspector OF Steamboats, at ashngton oauei
schwartz engineer Buffalo; Capt Bradford, Super
yising Inspector Of Steamboats, for tins Dsrlct; "
Stetson. Patent Attorney; j. w. Hopper, SteamDoat
Inspector; John A. Read. engineer; Mr. 1hean, wno
but the boilers OF the steamer st. John. end many
others.
Mr.. Wizard prefaced the experinentsiby explaining
that he had asked the attendance oil the gehtee
TO listen to any theory OF his Own as to the cause OF
steam boiler explosions: for. whatever might DC tue
preconceiyed ideas OF any OF the gentlemen presehs as
to what Is the real cause OF that class Oh aecaehss
which we have heretofore beel unable 10 prevent oy
the common care and appliances upon boilers or py
careful inspection test and supervision, al persons
must acknowledge that the phenomena were IN sone
way connected with the action OF the hre upon te
water or the boiler aud unavoidable by any general
appliance. All theories presupposed some oVsrneatns
or heating OF the boiler the water or the steam.
He was about to show the operation OF an apparatus
for eduazing the temperature in boilers ana ne was
confident that the experiments he would conuuIt "ouu
completely satisfy.them that no explosion woua occur M
20 n boiler properly inspected and tested IN whlcn tne
appnratus 10 be examined adjusted. Inc DOller In
which the fire kindled had been erected SOM
months since. for the purpose OF cohuuetne eAPeli
ments and testing various inventions intended 10
ize Temperature in boilers and had been snnleceu 70
the action of fire. almost daily for many weeks past 10
all which time il usually contained only ABOUT the sae
ouantity of water now in itabout ten gallons :" th
ont tho apparatus the fire would make ii all redhot 10
Eve minutes All the water contained In the boieIs
when the fire il started below the hre consequently
without the apparatus II could not De even
matter how long the effort 10 heat 1t Is continued
for water is a non.conductor Of heat. d0wnWaru.
You can only heat water when 1t is over or ABOVE tn
fire. The glass water gauge shows tnat .ae os se
he water is below the CRATES and that the gases OIL 1he
FIRE are not conducted around or below tue "asei !et
this apparatus has prevented the Doer' tue wasci G
the steam from being overneateu or unequa! m .Ha
70 an Objectionable extent in any part during al te
prey ious experiments The best evidence al
could require that this statement true Is 70 De loo
in tho fact that the boiler Is no, ouekieu OF u4stou
any mart not even directly over the fire. WneTe the
Mate, aro not covered by water and the Doher uocs
not leak although there is nov ~ POUNDS Vi
steam within II, as the steam'gauge ana the So!
valve show Ii has been constructed IN such manner
as 10 illustrate in practical manner as possible lhc
same phenomena would occur In locomotlYe Iorn
Of boiler; it, while the fire was burning IN H. so ucn
OF the water should be blown out as TO leave ~
feet of the upper heating surface in the crown snee
aud upper tubes uncovered by water
About IS minutes after tho fire had begun 70 puth
bsky the steam being at pressure OF 40 pounds the
ha,moneter showed that the steam superheated
10 degrees when the spectators witnessed the nrst
essentially OF a chamber, float and three waves
The working parts exposed 10 sight, so that us op
erations can be seen 1t VIII NOT operate az oer
there is higher temperature In the TOP OF INC Doner
than in the bottom intermediaeiy When the press
are OF steam has escaped from the chamber by the op
Grafton Of the machine the pressure OF steam IN 'ne
boer surrounding the chamber acts to force up
the coldes water from the bottom OF ire ooler 10 u
again. the water rises, the escape va'e is snut au
l.. In fhq
In contact with the hottest steam. III the steam su-
perheaed the pressure in the chamber quickly becomes
Greater than the pressure in the boiler, and as the
xater cannot pass back the same way II entered.
third valve opcning outward from the chamber. per.
mIts the water-now hot-to dow out into perforated
basin and from thence Ii falls down 10 the water Deow
in the boiler during which passagethrougn tne s.ea
further reduction Of the temperature OF the Steam
occnrs and part OF tho whole OF the water so falling
is eyaporated into steam. The fire was continued ~
the experimental boiler tic chamber filing aud eject
inc the water at periods varying from seven 10 ten
m inutes and the Thermometer continuing 10 snow tna
the steam superheaied only about ~ wnica ~ y
A slight difference OF temperature and II was 'he
oppon OF the experts present. Judging IRON Ine guam
ty of steam escaping from the saetyvaiye, tnat the
boiler was generating As much II not more steam
than would be made by the same IRE under oner eoum
stances ,,,,.A..
After witnessing the experiments II was decided that
the following facts were established, VIZ;
Injecting cold water into boiler under such circun
stances would not be injurious. no part oeing over
No rupture coud occur from unequal expansion, be-
cause there is no unequal heating. -
No accommodation OF the steam could occur because
steam cannot be decomposed except BY coming IN con-
tact with iron heated 10 high temperature.
No undue weakening OF the boiler could occur from
making the plates red hot.
No sudden evaporation Of water TO increase the pres
sure as il the water in contact with bot plates
because there can DO unduly heated plates In the
boiler.
And no sudden increase Of pressure from the comm
nicaon OF surplus heat OF superheated steam TO ne
water because the steam cannot be superheaed 10 any
dangerous extent .'.,
B9 increasing or diminishing the weight OF the
valve through which the water Is elected from tine ap
psrau use3 in the boiler the degree Of superheatins
In the steam can be increased or diminished
The gentlemen present conceded that the experiments
were conclusive and the inventions were pronounced
10 be great success After the principal experiments
were concluded Mr. Wizard performed number OF In
terestng experiments with glass models and ap-
naratus. showing the inutiliiy and uneer.
tainty attending many OF the present approved
appliances for indicating or preventing dangerous occur
rences within boilers and illustrated in striking man
ner how it was possible and probable that the water In
boiler might appear to be at the proper hight when
there was nos proper supply within IT. and now the
upper surfaces might be quickly uncovered by starting
the pump opening the doors or closing the throttle
valve az we'll as how the hight Of the water surface
might be quickly increased by opening the throttle.
valve increasing the fire or stopping tne pump iuii
details Of which space will not permit US TO enter
into or describe and conclude by stating that
practical way TO prevent the recurrence OF TINS ter
bic class OF accidents seems TO be provided BY MI
WARDS apparatus.
The Maiden Murdcr-Applicatisn for the
Wit of Error Denied.