Star.
London, England, 1817-08-13 00:00:00

POLICE.

nOse- sTlt BlGT•—Yes•er.lay Iltree women of the WWII,&Ma
irc:b and Itf Arad, were again examined, along with
T. Hoping., w ..n coltaluted with Horton the principal in the rob.
bery of • t.O lure from a Serjeant in the Guards, as already
mentioned. liripki;ss had said in the wa•ch.bnuse where he
went to visit his Dulcmea, bat lie knew where the n one, war.
N thing of the kind, hoot ver, was Horton ar.d Hop-
kin. w.re remand:.'; but I urker and M'Onnald were di..
charged, ;ma promise to give ev;.leue..• when called upeo.
IJ. derot, touctiost.oo %tr. Ford, of Meckletibuigh-square,
*714 iiu.d in-. and costs tot turiuus driving, accompanied by
brut.' and ferocious • fuel to several person. in gigs and 4,9
foot. He hotelbean), kd:ed a child m Long acre; toil Mr.
I ha NIB expressed Lis regret that he could no: punish hint more
severely.
Colons I Drury, of the Cuards, charged a waternian'e
rice w t 6 cis:tieing I its. fur a 9d. tate' viz. from kVaterloo
Bridge to will bar% again to Westminster Budge.
'I he defendant's, master a:tenied, and said his apprentice bad
only Risco him ga CAL fp; the whole ut that day's earning; and
the hlagi.trite, uu the consideration that die Master was rot in
fault, abated the penalty. • I
Maystuit-Hettsr.— lee littetition of Alderman Pertieg, in
the absence of itl. Loan Mdrua, was yesterday called by eene-al
respectable tradeeninsto a long el swindler. of a novel descrilit
don, one of who-n stood as the bar. It has le en their practice td
Oren COllliting-lsuUsef and purchase goods of the must coneenibit;
day:: iption. paying hair ninny,' down, and giving hills payable at
the Bank of Gotland fur the other half. In no case have tlo.se
'hills been paid, the ace:lent.s having no effects. The Alderman
' r. grimed that he eitukl rot commit the prisoner for trial, the
cc eye not being sulhz;elitiv strone. He was therefore discharged,
with an adnionittun. tie is m mere than to years of ass in
appearance.
J. B.:iet, a youth, not more than is, and T. r.rlle, alto a
mere buy, but au old cff.nder. were fully committed, the tienwe
for snatching a watch from a niantle-iiece io Smithfield; avid the
latter for iiickleg pockets in Newgate Market at the early boat
id six ha the morning.
IrOIRSIIIP-STltatr•—iresterday P. .111.deney, porter to Mr.
Fellow., an ironmonger, of Aidertgateourect ; and S. c•tri,4l
dealer in marine stores. in Chequer place, Chequer-nquan, were
h illy committed, the farmer fur sealing, and the hatter for Ti.
ceiving, brass mil ironmongery goods, the property of Mr. Fel.
lows. Mr. N. stated, that he had been robbed of .1300 worth of
ProPectt last Year.
T. J.ger, at Islington, who was charged with poisoning 111
fowls, the property of Mr. J. Seers, by strewieg about barley
steeped In amide, gave responsible bah for his appearing to tics
charge at the staving Middlesex Sessions.
Qv ZEN•SQUAIIa.—ViOLINT AllsA WA. Bashi, wag.
goner to Messrs. White, wpolesale grocer* at Hounslow, was
brought before the Sitting Magistrate (Was. Fies.pteo, Esq.) by
aLabieveturelaedrr,onthaenoth.
rerresid,
ionus aaesh;ogarer7,adbroe by,4l4.L.Wt,laessioomasetta rearm;
and who also keeps a house at Hammerstnith,of violently amides
lag hit person. Prosecutor stated, that on Wednesday night,
mhaerrisuingihthu,sianeinesedhisKa.t;bridinadrorngt:onwhhercconsetelarbsigeitefaralarea
piscerepanstids himirsbetwazdinsiw.Hruks.tr.
lians.green
ling the road. Ise overtook two waggons, Ike driven of which
pwafterethblii, riding
gs
vin their
erygen sctly.,tiaa Wndhaagras.almoel.efectedelideavir, redethetno
the fore hone of the team belonging to the waggon .h4endaet
was driving swerved coins site, avid began to bear so hard upon
his horse and gig. tkiehe was compelled to give them a gentle
lash to prevent his home" and gig being pushed aver the edge of
the new raised road on which they were. On whin the defen-
dant instantly jumped down from his wargon, and with a loos
waggoner's whip dogged the complainant In a most unmerciful
manner. Cornplainaut could nut defend himself, bring obliged
to extricate hind If mum his pet dews actuation. Hs was ordered
to god bad, which MK being able to d he was committed.

CORN•EICIEAPIOII, MAIM LAN I, Acoubr redly..
don of. IQs. pm sack in the its ice of F.our, at tbe clove of Mon-
day% market, occasioned very heavy sale for Wheat this morn.
We, at Monday's prices, but only prime qualities could be tits.
posed of. In Beats, l'ea., Llarley, 31841 Oats, ttere was hut little
doing, bat each article is to MA the Viers as MI Monday

Itrof the Collf lifilTEE on Sl BWJTS.

(Centiomd from the S-rmt of Wes!ne,,lty )
Mr. drthur 146 I.l's evidence contbbled.
Do rot! consider that the ca,t iron !wiles-, upon the
common construction, it egnally 164 fe with a wrought
iron to& ?—.Not upon tl;e comnsais construction that
I hsve sent ; some I shnuli have Jailbird very
much ; I have sects some that are tarter d4ogerousi
my patent consists of one composed of a number of
tubes.

What is the difference between your construction
of the boil. r and the conimon constructicn, which,
in your ootni..n, renders yours so eruct, safer than
the other ?—lt is alaitlys necessary iit• bailers to have
a ectaist tpiaotity r,f suriace'ex;ioseD to the action of
the tiles to •zorttain heat and Itlearn ; and it that be
done in or vessel. of course it must be of considers.
ble size greater in diameter than it composed of a
number of tubes I and the tisk of explos;on is in pro.
portion to its quantity of surlace.
Do you mean to :Ay that; generally ?—With the
same pressure, certainly.
Woulu your boiler he as well adapted for a Steam
DO2t, as those generally made ?—Ve%, they are cal-
colated for every purpose; they are generally adapt-
ed to high pressure strata ; my patent was tak n out
CI a ufe boiler for a high pressure engine; indeed,
in my own engines; I Jo not work the ote4m to that
height as is done in what is called tie high pressure
engine, es the novelty of my engine is, that I work
the steam twice over.

What precautions do your take to prevent acci-
dents ?—1 always make my boiler to stand from 11
to 20 times the pressure that I ever make use of.
What prrc.►utioa do you make use of. to prevent
a greater pressure?—The safety-valve is what we
depend upon I alwa)s apply two safety valves, as
I ha% e seen incidents where the valve has accidentally
stuck fast and would not act; and I have a safety-
valve, of a particular construction, that never can
stick fast.

Du you use mercurial gauges f—Never for a
satrty.valve ; I never found it necessary to have one,
not for an escape.
Have you any other precautions besides those you
have mentioned f—Nut any, but as to trjing boilers
to we that they are strong enough ; that is the point
that I recommended in my speFikcation, that• they
should be proved by pressure. eery time the boiler
is emptied for cleansing; then to fill up the boiler
with cold water quite full, it'd put an extra load of
five or ten times the power of steam ; and then, by
a forcing pump, to syringe welter in till it lilts the
valves; (Jan there can be no clinger, there can be
no explosion.

Suppose a cast iron boiler, and a wrought iron
bo ler of about the same form and capacity, to be
exploited by the force of the internal steam, do you
tlink that the mischief likely to be produced by each
of those, would be equal ; taking any form you
please, and exploding both, which would do the
mem mischief ?-1 Jo not think the wrought iron
b Alta would separate into so many pieces as the cast
iron boiler.

Then do you think that the explosion of the
wrought iron boiler is attended with as mach danger
as the cast iron boiler ?—la every thing, excepting
what depends upon the fragments of the iron itself ;
I hare no hesitation in saying, that cast iron boilers
are sal I r than wrought iron boilers.
Wl.y ?—Because we can makeihem of a greater
mength ; you cannot make a wrought iron boiler so
strong as a cast one.
For high pressure you may have a boiler of cast
iron vrwigtor than you can of wrought iron ?—I can
make it str. nger and more to be depended upon for
great pressure ; but wh. re great pressure is not
wanted, wrought iron can be itir de sufficiendy strong
to depend on.
Supposing an accident happened, would not a
wrought mita boiler be attended with as great mis-
chief as a cast iron one?—As great a number of ac-
cidents happen from the common boilers or wrought
iron loosklll, as from the cast of:es.
Ms. Andres, Vivian celled in, and examined.

What is your profession ?—;sliiier and engineer.
Where do you reside ?-isALCambOurne, in Corn-
wall.
,Have you been long acquainted, with the con-
struction of Steam Engines ?-17or .thirty years and
upwards.
Yoe ate then capable of giving an opinion as to
those circumstances by which danger is occasioned
in the working them. and the glititllb of preventing
it ?—I am.
De pleased to state them ?—The danger arises
from making the steam vessel of insuiLcient burner
for the steam; every engineer ought to bc well ac-
quainted with the power of the steam, and make
the swam vessels in proportion to the strength of the
steam required.
What precautions do you use to prevent explo--
sions?—Safety-valves; not less than two on every
boiler where a high pressure of steam is required,
and that the boilers be made of sufficient attends,
and proved before used.

To what proof are 'those boilers subjected, or to
what proof ought they to be subjected I—By filling
them with water,ind loading the safety-valves with,
perhaps, teatimes the weight requieed for the engine,
and then by injecting water into them, so its to lilt
those valves with ten times the weight required.
When yOu say ten times, do you mean exactly ten
times?—Perhaps ten or twelve times the weight it is
Intended to work.
You conceive that a boiler which has been'so proved
and furnished !with safety.valvit, properly adjusted
to its contents, to Lc perfectly safe it; working with
ste•im, whether lath Of low pressure?—Yes, I do. •
Is there Ail di Culty in so adjusting the apertures
or vales; that is, in calculating of what size the
valves ought to be. to poduceisatity in a boiler of
any given magnitude no diflkulty at all ; it is
a plain mad well known thiog to• all engineers, or to
eveiT one. who ouitlftio pteten4 to be an engineer.
Is it usual to work a high pressure engine at all near
to that point to which the ya:ves are thu adjusted ?
—We load the engines in the mines ender my direc-
don's, to about forty pounds' an inch; And. the valves
are dim loaded to •:hout fortylve, perhaps.
But those valves are capable of being loaded up
to the foil extent to which the engine has been
proved I—Yes.
lit it not easy and ctsexcnn so to construct one of

the safety-valves, of which you have epolten, es that
the engine-man shall Lot lo•t able to load it beyond
the pressure intended ? One m.ty be locked up, and
very easily kept from the engineman.
When that one is so locked np and kept from the
engine•niaii, is it possible, according to the common
cakulation of events, that the boiler should then ex-
plode if the valve works Ireely ?•-1 do not conceive it
possible that it could.
Is it not eat), so to construct the valve as that its
operation shall not be hindered by' any accident, such
as adhering to the sides or clogging from fouling, or
Any thing of that sort ?—Very easily constructed, so
as not to be liable to those accidents.

Do you then see any reason why, in any situation
whatever, the use of an engine should be limited to
the low pressure, or that which is usually called the
ct,o,:etising engine ?—By no means in the world.
Do y. u conceive that there is any difference in the
liability to explode, between the boilers. consttu:t•st
of wrought and of cast iron should conceive :bat
cast iron could be made much stronger than wrought
iron, with less difficulty t I conceive it to be a very
difficult thing to make a wrought iron boiler so
strong as we van have it cast t we have some of our
boilers in'ade two inches thick; and to make a
wrought iron boiler equally strong as that, would be
very d.:,!icult to be acct.mplished by work:nen.
Supposing a cast iron and a Wrolight ;TIM to be of
the same form, and each of them to be exploded by
too great an internal force being applied. which of
the two do you think is likely to produce the greatest
mischief in the explosiois ?—Certaiely a cast trot
boiler is likely to separate into more parts thaw a
wrotight may be, and is Ll:sly to do (wiry. mischief.
Whit accidents have happened to steam boilers.
within )our own k:ir.ViCiir,e, working either with
low or high pressure steam ?—I have known of no
accident with high pressu:e steani and cast iron hoi•
lets; but I have known an accident happen working
with Bolton and Watt's low pressure engine, which
was on the 2Sth of November, I 81 I. in Wheal Abra-
ham Mine. A wr• ught iron boiler, work;ng with
low pressure steam exploded there, "and scalded six
men, three of whom died in the course of a wet.''.
afterwards.

Were any persons at that time killed by the frag-
ments of the iron ?—No; it was entirely by the steam
and the water.

Do you recollect any instance in which a wrotight-
iron boiler exploded, so as that any person• were
killed by the fragments ?—I do nut.
Do you at all know whesher there is any diffe-
rence between the power of the steam or water to
scald, wbrit under high or low pressure ?—The
steam from low pressure scalds much worse than the
steam from high pressure. As to the water, I can-
not say. I cannot conceive that waier can issue to
any great distance from a high prrunre boiler : it
must soon be steam ; it must be converted into steam
from its beat ; water cannot go beyond 212 degrees
of heat, unless it is confined ; beyond that, it must
be steam.

Have you ewer known any person• scalded by the
steam or the water issuing from a high pressure boi-
ler ?—No.

Have you ever known any instances of persons
being scalded by the steam or water from a 1 ,w pres
sure one, besides that which you have mentioned
have heard of a great number of instances of this
in different mines, but only that one came directly
under my own eye. . .
You have given the Committee to understand that
when boilers made of *fought iron are t coosed to
steam of high pressure, there is great d,fficulty in
making them sufficiently strong, for that the rivets are
apt to dr.iw, and the joints to become loose ; do you
not conceive it very possible for the hailers, in such
eases, to neclme useless, by permitting the steam to
escape, and yet not to explode, so as to produce any
latal accident whatever ?—I am quite of opinion that
boilers made of wrought iron tor high pressure en-,
gine: will soon become leaky, and may not explode.'
I have known of an instance of a boiler of that de-
scription made for licilaad Mine, and it boon becanie
leaky and unfit lot use ►n a very short time; the con_
sequence of which i. the mina is knocked up, and a
great number of people out of employ.
But no accident happened in consequence of this
by which any person was injured ?—No. 1
Supposing the only object to be safety to the lives
,or limbs of the permits who should be surrounding.
the engine, would you in that case prefer having the
boiler a a high pressure engine of wrought iron or
of cast iron ?—I would have cast iron, because it
can certainly be made stronger than wrought iron
for same expense.
Do you take into that calculation the difference of
the mischief winch might be occasioned, supposing
the boiler by any accident to explode ?—I consider
that risk is so small As that it scarcely need be taken
into tie question ; because all explosions may be
easily prevented by proving .fie boiler every time it
is cleansed, which 1 think should be at least every •
month.

Is the operation of proving the boiler so easy as
that it may be performed ton board a steam boat
every month without expense or• inconvenience ?
Certainly it consists, as I have said before, on'y in
filling the boiler with cold water, patting great addi--
timid weight upon the safety•valves. and then inject-
ing water by a fOrcing pump till the valve is lifted
with additional weight.
Is it, then your opinion, that every steam engine
ought to be providedwith those means of provirg the
boiler, and that they ought to be applied as of on as
you have mentioned ?—Yes, they should ; the very
pump by which the boiler is supplied with water may
be used conveniently and sof&iently for this purpose;
high pressure boilers are all fed in the common way
by forcing pumps, and there is no difficulty in ap
plying it to the low pressure boilers.
Hive you found the use of A high prey-tre engine
Of any advantage to the Cornish mine ? —Of very
great advantage, which can be proved by looking at
the monthly reports, which I am fully convinced are
OWING

Do you conceive that a low pressure engine can be
reckt nrd entirely safe, unless furnished with the safety-
valves, such as before described. and to one of which
at least the engine-man has no access conceive
that every engine ought to have those valves, and.one
should be locked up to prevent careless engine-men
doing mischief. which Livr pressure .engines are as
li.b►c to as high. r •
Have you any means cf tstintatins the costipara,

eve consumption of coals by either high or low roes
sure engines ?-I(es. . •
Be so good as to state your opinion upon that point ?
—I ctmceive that a high pressure engine does great, r
fifty with the same coals than a low, whiz!) will aiso
be proved by the monthly reports.
H the you any further information on this subject..
which you wish to communicate to the Committee ?
—Being desired to attend here on the part of the pro
prietors of three of the lsrgest mines in Corm wall, the
tiniud :nines of Crowan., ILlenath, and Weal unity,
I wish to state their hope, that the Legislature will
in interfere to prevent the use of high piosure en-
gines, either on board boats or in any other way.
Yon have not been used to steam engines on I.l3ard
boats, but in mines chiefly ?—Cliittly in mines. 1
have seen them on board boats.

Do your answers apply equ.try to steam engines
on hoard helms as in mines, or may not more.-mution
he necessary in boats than in mires'—[ conceive the
Answers to be upplic•rble to boats as well as to mines.