New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1855-06-23

rates more dcBraDly than steam aver Re cWDB.
In engineering language it is only moro economical
"wben worked very extensively" The vapor Of
bisuphure Of carbon has not yet been tested at any
high grade Of expansion but should it be found by
experiment TO follow the same law steam, the prac-
teal value of the fluid for this purpose seems to be
almost incalcuablc The credit Of the discovery or
invention belongs To Mr.. b. Hughes Of Rochester, In
this State who obtained patent for this application
THE PROPELLER SAaAH.--It is frequently desirable
in practice TO drive the propeller at such We
locity as would endanger the safety OF the en-
gines and gearing pitch-chains are introduced in
order TO surmount this difficulty. The propeller Sarah,
lately constructed by Capt Lopez Of Philadelphia and
row running regularly between this port and that city
is deserving Of notice. not account of the existence
of gearing but because OF it's novel character. Mess.
Dibben 4 BaNRmn of this City are the inventors Of
this model which is considerably lighter and more
compact than any Of the ordinary forms. Its opera
ton il one Of the most difficult to describe without the
aid Of drawings The shafts of the engine and Of the
propeller are placed exactly in line fact by the way
which adds greatly TO its convenience and forms one
Of the most desirable pecuarites of this machine.
To the inner extremity Of the propeer-shat is keyed
crank. The ongne-shaft proper is very short and
placed some feet further forward its afer end being
provided with short universal joint From this
universal Joint to the ext emes Of the crank extends
stout shaft which we will term the gyrdtiHg shaft, on
account of its peculiar motion, revolving while one
end is also compelled to describe a circle. gear
wheel s keyed this gyrating shaft near its after
end and stout ring of as-iron with suitable gear
on its interior surface is fixed in the vessel in such po
son that the gear-wheel shall always mesh into and
travel around whnit Incorporation ofthe parts may
be modified 30 thattbe propeller shaft shall be PEELED
to revolve as much faster than the enginesha may
be desired. The multiple in this steamer is q to ], 30
that while the engine makes 100 revolutions the
propeller makes 225 and the apparatus is reported by
the engineer as producing very little friction, noise or
vibration
WooD's ARTIFICIAL SroSE.-Among the patents
now just issuing to American inventors for new COM
positions more novel, striking useful than
one for artificial stone just granted to Mr.. John Wood
of Brooklyn. The materials employed sand, plaster
and hood the latter ingredient being, we presume
absolutely undreamed of for such purpose even in
this unitarian age The uses for which this artificial
compound seems especially adapted are statues and
architectural ornaments, as it may be nodded with
The same facility as plaster and gradually hardens
into perfect and Interchangeable stone 1t resembles
red sandstone in color, but may be painted and
ssnded to conform to any tint desired. In this respect
it differs materially from the Foster patent stone Of
sand and ime, drypressed, described in The TRIBUNE
a few months since, active lime in any such mass
may be supposed to destroy the paints. A far more
important quality, however, is the facility with which
it may be moldedinto delicate and complicated FORMS
the new material requiring neither pressure heat,
but few hours time TO harden into tolerably rigid
mass. few days hardening enables it to resist
considerable crushing pressure, and renders it fit to
take IFS place with suitable care among the ordinary
materials of city building. The new drugstore of
Messrs j. L. Pyle Bro. the corner Of Carroll and
Columbia-sts in South Brooklyn is being ornamented
with window caps and other embellishments Of this
MATERIAL and will afford the public good opportu-
nifty of investigating its merits for such purposes.
The materials for this artificial stone sufficiently
abundant and easily obtained. The sanguinary ele-
me mt now compelled to novel and tame pur
pose may be obtained in liberal quantities and pre-
served for any periods by admixture with charcoal.
The proportions fifteen parts clean sand five parts
cacined plaster, and four parts animal blood. When
first mixed the composition is about the consistency Of
stiff mortar and the most fragile plaster mold is suf-
citn for its retention during the few hours necessary
to the perfection of its FORM The cost, as may be in
ferred from this description is absolutely trng when
compared with the carved stone which it is designed
TO supplant.
All the beautiful and durable sandstones, now so
generally employed in buildings but particles of
sand held together in manner very nearly analogous
TO this. The chemical action in this composition,
which is presumed to 60 on until the whole is alb
soutely insouble, was described by Prof. Mapes be-
fore late meeting at the Metropolitan Hotel, some
what as follows: The potash of the blood dissoves
Al. .Izut tI,a
mass as s,licate Of potash the element to which all
material analogous to this owes its adhesiveproperes
The albunea Of the blood becoming thoroughly COM
mingled by manipulation is coagulated by the slicate
of potash and rendered insoluble-.hus forming locks
holding all the parts firmly together while the iron Of
the blood forms a sesqui-oxde, and still further
eements the The union of slick and akali alone
produces in some cases, very high degree Of hard
ness, as is the with eldspar and in this compost
ton are fulfilled in the language of the Professor, all
the conditions Of perfect stone no element except
time being wanted to insure its extreme hardness,
strength and ability to resist the action OF the elements
WrpsrrRs AeIrAroR CHURs MIR. H. Webster of
Opdensbursh in this State is the inventor of churn
which agitates and mixes air with the cream in the
most approved manner, and by continuous rotary
motion. An upright wheel with four wings is COM
PEELED to rotate rapidly in the midst of the Tactic fluid
and continually and violently throws the same out
ward by its centrifugal force while large circular
passage in the center of the wheel allows it the wheel
being completely immersed TO flow steadily down
mixed with air, ascsppg the bottom to be again
"sgitated" by the wings. This churn seem, to be
very nearly all that be desired in theory and is
Represented as very successful in practice.
s1oRns's CLOUD EscIsE.-Mr. VIM. Mount Storms
x-olf, Ia