New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1853-01-12

! cylIDcers, lOuI NOIAlHs a4lu A""A 0"Ff'.'
cordincly there are four furnaces, ingenousiy
arranged. and set without any extraordinary
outlay of brick, such as has been reported In
these q small FIRE is kept up with anthracite
coal. which is preferable 70 otherflel. because
il does not blaze-only its radisting heat is en-
ployed. Frem the CRATE 70 the apex o. tae
cylinder-bottOm, which is arched OF course
there is distance of FIVE feet. The cylinder
bottom is II inches thick. Before the engine
Is put in motion it may get to brown heat, but
AZ that distance it cannot get hotter As soon
as the cold air is let in it cOOls much below that
point. Thus there is no danger either OF fu-
sion, cracking, or oxydizing OF the cylinder
bottom. all of which have been predicted by
the sceptical A cylinder-bOttOm viii last FIVE
years-as long SIS steam boiler; or iii gives
out, can easily be replaced. The difference in
the cost Of replacing eylinder-bOttons snd
steam. boilers would in large ship, be from
thirty to forty thousand dollars in favor of the
former
The piston in the working cylinder S made
6 feet deep from top to bottom, concave under
meath to fit the cyInder-bOttcm, and fat az the
top. The top as wei as the sides are Of iron,
but the space between is filed with gypsum
and charcoal, nonconductors of heat. Thus
while the bottom has the temperature of the
hot air in the cylinder the top is perfectly cool.
+ The heat there is barely sufficient to keep the
taIow used for fabrication in iuid state, not
10 burn it, In fact one can stand upon it as it
playsup and down, and many gentlemen amused
themselves yesterday by riding there. This
enables the engineer at any time to grease
Just the part of it which he may desire when
the ship is careening for instance, and the fric-
ton Of the piston is all on one side, that side
can be directly fabricated. This is point of
great practical Importance, which cannot be
attained in a steam engine. Nor is there any
danger Of burning the packing, for it Is at the
top of the piston and never comes within less
than feet Of the fire.
The cylinders act in pairs, and in each pair
the action is reciprOcating; that is to say as
the piston goes up in one, it goes down in the
other
The pressure for which the Caioric engine is
calculated is II lbs per square inch, and to
obtain this il is necessary 20 heat the air to
3s47. By raising the air TO i5O7, pressure
Of Is lbs could be obtained, but IBIS sufficient
for practic purposes, and more convenient TO
manage Capt. Ericsson is of opinion that
that viii be retained as the maximum pressure
by future builders Of engines. Yesterday,
owing 10 the unfinished state of the machine,
and especially of the valves, it was impossible
to get more than : lbs. pressure. With that,
nine or ten revelations we're obtained per
minute. The full number Of revolutions to be
had from the Ericsson's engines is reckoned at
F ~, and at that rate it is calculated that she
will make from 10 10 ~ miles an hour. This
is the utmost that is hoped from her, and We
think rather more than will be obtained. Her
engines are not powerful enough 10 make her
competitor in speed with the fast Collins or
Cunard steamers. For that she must have
larger cylinders. The means of increasing
power is to enlarge the diameter OF the cylin-
ders When these engines were built, Capt.
Ericsson desired to have cylinders of is feet,
hut no establishment would undertake to cast
them. aud Ii we're the largest he could get.
Now, Messrs. Hogg X Delamater are ready to
make them of any size required, at their own
risk
The smoothness with which the engines
worked was remarkable. Capt. Ericsson
said that ! ID. pressure was enough to move
them. The amount Of friction he finds very
mach lees Jhan he anticipated. The coal con-
sumed b. the whole four furnaces is at
tie rate of 6 runs in "a hours; tuns
is the utmost limit Of their consumption. The
engineer and one fireman suffice to tend the
whole mechanism There is no unpleasant
smell as about steam machinery. There are
two smoke pipes and two pipes to carry Of the
escaped air. These pipes are l2feet above the
deck and 30 inches in diameter They are
painted white, with gilt rim at the top, but
there is not smoke enough to sully them. The
amount OF air passing through the four cylin-
ders il an hour is from 30 TO Is tuns This
keeps the ship perfectly ventilated II was
cool ard pleasant in the immediate vicinity
Of the furnaces
The Ericsson ia beautiful ship as she sets on
the water; lovelier model one would not
wish to see She is 260 feet long on deck 40
feet beam depth of mold y diameter Of
wheel 80 feet; length of buckets l0l With
ballast in her, as at present, she draws II feet
water. Her bottom is moderately sharp, and
she is one OF the strongest vessels in the port
The hull was bull; by Messrs. PerriRe, Patter-
son & Stack, Of WiliAmsburgh, and The en-
gnes by several builders under the oversight
/ r Dor- Eriaxeop hfrusalf