New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1859-09-24

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sure gauge applied to the cylinder would indicate IN
amount Of expansive force ost between the boiler and
engine, approaching the effect of the throttle valve
nearly in proportion to the hight Of steam in the
boiler.
CoxPRrssEp Air As MEANs OF CoNsrSIcArNe
! PowrR.-Messrs Debsip Bottom and Zslhsr have
recently applied to the Project Of the Seine for permits
sion to lay mains through the streets Of Pa for the
introduction and circulation OF compressed air. This
enterprise" as they cay in their application, "ess-
sists in the compression Of air by means OF hrgs
establishments, which erect outside OF the city,
the air TO be led through the whole city
bv system of pipes similar TO that used for the destr-
button OF gas furnishing means Of power and he
wherever il may be needed II is well known that 4
require. considerable time to set up the ordinary ms
chimes for obtaining power; whereas We can intro
duce ours generally in halls day, and in the mot
difficult CAGES in two days. and when this is once dons
the operative who it is perfect master oft He
can run il BY day by night, and can begin and end
work whenever he plesses without interfering with
his neghbor The amount of power furnished 10 ness
ured by meter. He has no boiler TO heat, end lose
none of the power which is lost in the ordinary ass OF
steam. In q word, power is domesticated.
And this air is not confined 10 its use TO the nov
ing of machinery. A simple cock will replace the
cumbrous believe in the smiths shops and will furnish
much oxygen the air being more comprsssedthan
by the bellows, producing much more perfect and
much more intense combustion. Those trades which
require continuous occasional draught of cir will
| always have it at hand.
1T will also be Of great use in the economical heat
ing OF buildings as current Of compressed air blow
ing the fire in the furnace will produce perfect CON-
bustion of the fuel. The power which il gives may
be applied to elevatng water into the upper stories
| and much other work.
"The health Of the city will be improved by Tho
| dminution of smoke, which wil in the end, be Gu
tirely consumed. Hospitals, sewers, workshops ten
ant.houses and places OF public assembly may be ven-
tilated by currant of compressed air more cheaply
| than in any other way.
"The price at which it will be furnished to the pub
lie for use will place it within the reach Of all.
There is no danger to be spprehended from It;
even should the pressure be great ~ lOpounds per
square inch tubes can easily be made which will sus-
tain IT, and if tube should burst the air streaming
out would be no injury, except by its loss to u.s.
CHEAP BARoNErER.-The necessity for cheap,
simple and compact barometer has long been felt,
especially by farmers for next to that Of the Mariner
the successful performance of his duties depends %
a reliable prognOsticatiOn OF inc Woothof'
| "Beaumonts Metallic Barometer" is new inven-
ton intended to supply this necessity and a. they are
sold at the low price of IS each, the inventor in
forms us that in addition to his wholesale trade he 10
daily receiving orders fom farmers throughout tho
| country.
Unlike other barometers, this has no glass tube or
mercury and is consequently less liable To become
disaranged or demolished by slight accidents. The
case of the instrument is cylinder OF brass nicely
finished Il inches in diameter inches deep, pro-
vided with q ring and intended to be suspended
against wall. 1t lie closed in front with sglass
through which is a hand moving OIL the dial. 1t
Ia olosed at the back with solid plate, 10 which ~
the machinery is fastened. The most important part
of the instrument il spring elastic vessel made Of
corrugated plates of brass, inside Of which perfect
vacuum is made when the opening CLOSED by solder.
| ing. At the moment the vacuum is made the spring
cortracts good DEAL and afsrward expands or con-
tracts little for every change in the pressure Of the
atmosphere. To make visible these minute varia-
tons the spring is made to act several Multiplying
levers the last of which is linked to crank on the
spindle which carries the index, indicating the IDENTITY
ard humidity Of the atmosphere.
| English ARsESALs-WHEEL HAXING.-A single
Government Arsenal of Great Britain covers go acres
of land, and is divided into the gun, carriage, and
laboratory departments employing at times II 900 men.
| During the late war; 10 500 shells were made and
passed out of the laboratory in one day. large build
ing is now being erected, with machinery and other
convepiences expressly for manufacturing the Arm
| strong gun.
The carriage department where gun and amrnuni-
| ton carriages are made, employs ~ steam engines
amounting to 400 horsepower, three steam hammers,
l6 steam boilers and nearly mile Of Skating, trsns-
| hitting power to 800 machines. A machine used in
this department appears TO be not only an expeditions,
but very effective method Of putting together the
various parts Of wheel, which might be successfully
| applied by some Of our extensive carriage msnufac
turers 1t consists Of circular PLATFORM on the outer
edge of which are movable segments Of circle, con-
| nected with a hydraulic press. In its operation,
wheel, with the ends Of the spokes barely entered Ia
the hub and fely placed the platform, when the
| press is put in operation and the movable segmen9
are forced equally all sides against the periphery
| of the felly-thus driving home the lemons OF the
spokes more perfectly than possibly be done by
| hand.
The difficulty and labor of driving spokss with
suitable force the occasion of many wheels being
made that depend solely tight fit OF the tire to
hold them together; but as this soon expands by the
constant hsmmering it receives In use, nothing short
of the force Of good hydraulic press should be used
to squeeze the clOseyftted wooden joints into place.
ANEW STEAM BoILER.-Joseph Harrison Of PhiIs-
| dephis Russian contractor, cOtemporaneous with
the Messrs. Winans Of Cigar steamer notoriety,
! has recently constructed and put into operstion
newly-d.vised steam boiler, which for novelty and