New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1871-08-10

@ Then how do You know that tho ordinary valves
stick A. From the testimony of experts and engneers
have exploded with less than a. pounds
is proved that there not moro than a pounds pres
count for III A. 5nch valve would not rise any more
with co pounds pressure than wi 30 mounds the velocity
has no appreciate powers 1t is The elastic pressure Mon
Q steam has weight. has It mott A. II has. -
q. Would not body moving with Increased velocity
have increased poweri A. nd that the rise OF valves
OF the same diameter is no greater at ~ pounds pressure
Q. wish to know why body moving with increased
giving you the facts in a thoroughly tested; do
not undertake TO account for it, it is no theory.
inch would relieve that boiler OF all the steam coud
maze with good fire and the furnace doors el9ed'
@ II You knew the amount Of fuel, could you tel
whether it would relieve the boilerl
NEW RULE.
A. Ny rule for determining that matter would I've this
Calculate the number OF pounds of water to the number
pounds OF coal and divide by CT pounds ounces THIS
viii give the cubic inches; multiply the number Oh
pounds Of coal consumed by eight pounds OF water 10
one pound of coal, and it will give the nlniGG ,r
of pounds Of water consumed In any given she Gfle
that by Cos, and II will give you the cuhc Ieei; MUMMY
again by 17oO and will give you the quantity OF s'en
generated in any given time. -. a., - 4.
O. What should he the of the orGce OF tho satcty
doors have been closed, tho drafts ecn aga an me
course the engine being at restf A.. do ut
know the velocity of steam at 80 or ~ p ounIe:
Il
but che escarng velocity OF steam at 100 pounds through
twonch orces is at the rate OF 1900 feet per sec0nd
II knew what the velocity OF steam Is at 80 pOdhas
could tell you the exact size which the OFFICES OF o
safety valves ought TO have been. A., ,. -.
O. Suppose there tun Of coal in tho furnace at
the time do you think that the valve rising $50 OF ~
would that boiler of steam as last as IL would
make A. do not think II would. , -,
O. Suppose that assisted by another valve three
inches in diameter In good order, would they both have
relieved the boler2 a. No, Sir.
O. Suppose the safcty-valvcs were both blowing on
ami the gauge indicated only q poundsf "A. should
question the accuracy Of the gauge.
O. Suppose the gauge proved to bc runf a.
should say the boiler In very bad condition;
knew an instance of a 100 horsepower engine with
9nch safey-vaye weighted ut GO p0un ~, blowing with
all IFS power and yet the steam increased So pounds IN
90 minutes which proves beyond all question that such
valves are wholly incapable of relieving the boilers Oh
which they are placed. ,----
O. DO YOU believe that Of your valves OF the same
diameter would relieve such boiler on such an occasion
a. 1 am unable to state positively, but viii say mat
tie reench valve which represent opens al 90 pounds
pressure onefourh Of inch; it opens higher ut SO
pounds pressure.
Q. Do you suppose that one Of your 81 inch valves
would have been sufficient TO relieve tbs boiler with the
intense fire that they could have built A. nave
doubt OF it, should prefer however, to put on TWO
small valves. -
The Board then adjourned until this morning at 10
o'clock, when U is expected that the Committee ap-
pointed by Inspector Low To examine the boiler vi Inc
WCstiicld viii TcpOst.