New Orleans daily crescent. [volume] ([New Orleans, La.]) 1851-1866, 1866-04-30
NEW ORLEANS, April 20, 1866.

Editor Crescent: '' Ap'i 80 1000
My object in calling attention the card of Mr. Roy which
appeared in issue of the 2h gentle
man in his explanation of certain PRINCIPLES This
was at such variance with my understanding
the subject that could not permit pass unnotced In
his explanation of the of the explosion of boiler he
states that the water in the boiler will b. Temperature due
the PRESSURE while the steam may under
similar to those which existed in OF the late explosion
on the jackson Railroad reach temperature three hundred
greater Mr. Roy answer which appeas in thu
Times Of the 18th still adheres same opinion and
duces what he considers proof substanate his opinion
The st evidence which the gentleman produces is that the
Great Eastern exploded her dunn which WAS eaussd
oy the steam being superhsated hot smoke stack piss
ing through the Jacket This has nothing to do with the
subject the evidence shows the steam was
after leaving the boiler by the hot smoke stack
His next evidence that Of experiments on the
Johns" in which explanation of the nature of the
objects of the experiments given in which the proba
otes OF error are evident render reference entirely
unnecessary.
The gentleman ntmates he would be pleased to bsve
me explain the Of explosion upon any other prncnss
than those given by him In reply this will state that tho
explosion Of boilers not the subject
ana REFER MN to an article which appeared CRESCENT
with some slight and omissions dated March 18th 1855
under the head of Tubular Boers In that article the
poson OF boilers explained principles entirely different
from those given by Mr. Roy.
have stated that the temperature the steam in bosr
Is precisely the same as that of the water cannot under
any circumstances be changed the benefit of those
in their lofty soarngs in keeping pace the times
nave by pressure business been kept within the sphere of
learning viii endeavo by reference simple operation
OF generating seam to show how impossible it would be tn
give greater heat to the steam than which we give to
the water II we take cylinder the diameter which shall
oe equal TO one square inch and put the cylinder one
CUBIC inch OF water then apply lamp the bottom of the
cylinder we will lind by the application of thermometer
continuous increase of temperature until degree of 22
reached at which point the temperature to rise and
the lamp be still applied the will gradually eyaporate
and the cylinder be II % inches high will ascend
the top by which time the will have entirely
rated During this operation the temperature of the water
and steam precisely 22 The steam could not pos.bv
obtain greater temperature than the water nasmuch AS
every degree of heat given to the
through the water.
When engine is for convenience great dis
lance from the boiler is found that great loss is sustained
by the condensation of the passing through the pipes
to the engine to obvate which apparatus called
heateris placed in the lower part chimney The object
OF this apparatus is to give additional to the steam
after leaves the boiler which heat given by the steam
Oh its way to the ngne and the cylinder
the same temperature at which left the boiler 1t is evil
dent that steam cannot receive greater heat while remains
In the vessel in which it received bv the
water from which supeheated steam is steam
shst has received additional heat passing the
superheater after leaving the boiler the gentleman is
opinion that the steam be of greater than
the water he would do well define by some other
than that OF superheated steam
Yours respectfully,
VIM GOLDTNG