New-York daily tribune., 1857-08-24

,hs the rr9inee vcyhed vessr, and tbs may Do essy
guarded a. ssst BY proper csge from the stsspsh'S'
sYy.s WJscHEs Steam apparatus for hoiehps se
used IN erecting new buildings in few ciNes; hut rs
,,,,,n6ed ,ha, m NewYorh the instruments together
with the heads Of the operators, would be broken oy
ed nares aud their use hes not been at empted
On vessels .key ~ more essly introduced There Is
On m. Collins rier and sno,her board the Van
de,b Most Of Tho propeilers provided with them
On her ast ypyase, the Qleen Of the South hos:ed
IN o0O trns Of ca-yo in seven hours, with consumP-
,;o, of one ,ur Of coal in the small boiler. The
xrches esn a. pleasure be connected with the boilers
Of the steamers and the sailors very apt to avail
,b.ns.l Of this arrangement no. only for hosting
loads from the hold but also for hosting or furIng
sails.
LARGE ScRYw STrAxER.-The largest steamship OF
this kir ever built was launched in Glasgow month
ago. She is intended for voyages to Australia Her
mower IL .teed 10 be 100 horse; this would be called
here 500. She is , 500 tuns burden beam, Il feet
length over a 800 feet; depth Of hold 81 fest Sue
has two direct action engines, six tubular boilers aud
n tlree.bladed propeller. She will carry 900 tuns OF
goods and her bunkers will stow 500 tuns Of coal
enough for twen.5 four days at fell steam. IL IS un'
,ecessary 10 saw tha: this vessel is of iron, IS none
brt iror screw pror ,lers are made in England. The
ruuber Ct these vessels s rapidly increasing in the
mother country end they eeem destined to supersede
MI others in therarsportation of goods Of some value
The fact is ow practically demonstrated that 1t Is
necessary for the economical aEd successful WORKING
Of a screw propeller tdst the form Of the vessel be
very sharp toward the stern, so as to let the water HI
the wake smoothly and be at rest when acted upon by
the screS Such sterrs built Of wood would not be
sufficiently strong but they very easily made OF
iron The English cen do il to better advantage than
we. AZ wood is desrer and iron cheaper in Eogland
than in America There aro now four EDglish steam
eis TO one American tradiEg with this port, and next
year, when the three hundred propelers now building
in the United Kingdom shall he ready, the proportion
will be ten English to enc American AT the present
tine, English and French goods, amounting in value
TO tvo.f.ths of the whole importation. are carled 10
New-York in steamships While the British shlp'
wards are so busy, our builders have nothing to DO,
ard there are reasons to fear that we let the English
get too much ahead Of US. Is it not possible, aud
even easy, to combine iron with wood in building
.teamshpsl The central portion would be wood ana
the bows ard stern iron. Ii this were successfully
tried our merchant ships could be easily transformed
tito yropeers by cutting of the ends, builcinS them
anew ef iron with an additional length, and putting
an engine in the hold Something of the kind has
Leen done in France for men-of-war.
THE HusSISG THIHBLE, invented byJ. Ii Gould, Is
in.:Ge ike en- ordinary thimble, and outside like
finger aving metallic nail. This little inssrument
Is very favOrably received by Western farmers
prevents broken nais, sore 6nsers, aud enables the
ialmer to do his work rapidly 1t is suggestive
Of various arrangements for other kinds of finger
work.
GALvAyIc CuRRExr-C. Kuhns Of Bavaria has
Il. II haf Tho vafio of the
zirc surface to that of copper depends in great
measure n the quality of both substances, and that
to produce economically the greatest result, the rea
live sizes have to be found expermebtally in each
Gaze. For this reason he uses amagamated
wires of zirc instead of the usual cylinders, aud
increases progressively the quantity of it till the
maximum strength Of current is reached. The same
inventor has also discovered that when the battery 10
heated to 1867 Fahrenheit the current produced u
stronger than any other temperature, and he has In
vented battery which may be heated easily hcon
SITS OF castiron box divided into two portions by
false bottom. The elements placed side by side IN
! the upper compartment in bed of sand. ln the
lower compartment is alcohol lamp. The sand gets
| urcimly heated and keeps the elements at the
proper temperature After little practice any person
| will find how the wick Of the lamp has to be trimmed
to hea. the sand up to 1907 and keep it at that tenn
| perature. This process is used in most Partisan
offee. houses to keep coffee warm as possible
without spelling it by boiling. 1t ia probablethat the
strength Of current il proportional to the quantity OF
chemicals used up whatever be the process for pro-
| ducirg the came. Hence The question, will warming
the battery increase the strength of the current,
more economically in cest of apparatus, expense Of
chemicals labor and risk getting out of order, than
making it larger by adding mole of the elements 7
e ~k.ol ..
crooked OF when portions of it are thicker than
Others or the whole is very thick the ordinary process
Of hardening in wser is inpracti:abe, as the piece
would crack or twist For this reason when exactness
is required in piece Of machinery, it is made of soft
steel though hardened metal would be preferable in
| II oct cases. The following process does away with
the difficulties just mentioned. Let vessel be half
filed with clear water, half with oil; when the heated
piece is blood.red dip it in the upper layer of oil and
as soon as this ceases to boil lie, go the bottom into
the water This plan gives steel the proper degree Of
hardness for dies or pieces of machinery; 1t is
sary to soften it oven fire. when hardened in water
Hlon-PRxssuRE ATMosPHERE.-Dr. C. II. Taylor
Of this city has completed airtght box in which
patierts are placed to be compressed. The sides Of
the box are provided with several heavy pao glasses
to light the inside and make the patient visible.
| The air is compressed inside by means of q
double airpump placed outside. An Ashcroft gauge
| is attached to tho box. This plan for curing
some diseases has been used in Europe for
rearly twenty years. A man placed in this box in
| con pressed air is in the ssne situation as diver
under diving bell, ard the same physical effects
Occur-s rushing sound in the ears &c. 1.-THE pumps
are reversed ard the air inside be rafed the effects
OF being top Of q mountain, or higher yet in a
balloon, will be produced. The pressure of the tnos-